Sunday, May 3, 2015

Endangered Species

Answer the following questions:

1.       How many species were included when the Endangered Species Act of 1973 was put in place?
Enacted in 1973, the Endangered Species Act emerged as a result of concern about extinctions of “various species of fish, wildlife, and plants in the United States”.

2.       What are the steps for a species to be on the endangered list?
The Endangered Species Act was revolutionary in that it explicitly recognized that to protect species one must conserve “the ecosystems upon which endangered species and threatened species depend.” Specifically, “critical habitat” is the area occupied by a species requiring protection that contains the physical or biological features that are essential to the conservation of that species. A species can be listed in two ways. The United States Fish and Wildlife Service (FWS) or NOAA Fisheries (also called the National Marine Fisheries Service) can directly list a species through its candidate assessment program, or an individual or organizational petition may request that the FWS or NMFS list a species. A “species” under the act can be a true taxonomic species, a subspecies, or in the case of vertebrates, a “distinct population segment.” The procedures are the same for both types except with the person/organization petition, there is a 90-day screening period.
a.       If a petition presents information that the species is imperiled, a screening period of 90 days begins.
b.      If the information is substantial, a status review is started, which is a comprehensive assessment of a species’ biological status and threats, with a result of: “warranted”, “not warranted,” or “warranted but precluded.”
-          A finding of not warranted, the listing process ends.
-          Warranted findings means the agencies published a 12-month finding within one year of the date of the petition, proposing to list the species as threatened or endangered.
-          Comments are solicited from the public, and one or more public hearings may be held. Three expert opinions from appropriate and independent specialists may be included, but this is voluntary.
-          A “warranted but precluded” finding is automatically recycled back through the 12-month process indefinitely until a result of either “not warranted” or “warranted” is determined. The agencies monitor the status of any “warranted but precluded” species.
Essentially the “warranted but precluded” finding is a deferral added by the 1982 amendment to the ESA.
c.       Within another year, a final determination (a final rule) must be made on whether to list the species. The final rule time limit may be extended for 6 months and listings may be grouped together according to similar geography, threats, habitat or taxonomy.

3.       What are three general causes for endangerment of species?
The most prominent current cause is human activity, which brings about loss of habitat for species and also causes pollution and overharvesting.

4.       According to the Act, what happens once a species is listed as endangered?
Once a species becomes listed as “endangered” or “threatened,” it receives special protections by the federal government. Animals are protected from “take” and being traded or sold. A listed plant is protected if on federal property or if federal actions are involved, such as the issuing of a federal permit on private land. The term “take” is used in the ESA to include, “harass, harm, pursue, hunt, shoot, wound, kill trap, capture, or collect, or to attempt to engage in any such conduct.” The law also protects against interfering in vital breeding and behavioral activities or degrading critical habitat.

Part 2 Species

1.       Choose a species from this list by matching the first letter of its common name to the first letter of your last name. Some of you will have more choices than others!

Sea Otter

2.       State the scientific name of your organism in proper format.

Enhydra Lutris

3.       Write a four-sentence description of the species itself, not its endangerment.

Sea Otters are mammals and carnivores. They often float, laying on their backs, on the surface of the water. They even sleep that way. They are often seen in groups or in kelp beds. The sea otter can be seen  on their backs with a clam or a mussel and a rock. They will beat the shell with the rock on their chests, until it breaks open. Sea otters are the only otters to give birth in the water. They hold infants on their chest to nurse them, and quickly teach them to swim and hunt. Sea otters are also very clean little creatures. (http://animals.nationalgeographic.com/animals/mammals/sea-otter/)

4.       Include one photos one video (no more than two minutes in length) showing the organism in its natural setting. Do not use any material showing harm to this organism.


5.       State one specific cause of its endangerment (might match with the characteristics from Figure 9-3).

Sea otters were hunted for their fur to the point of near extinction.

6.       State and describe one specific conservation effort on behalf of this species. Name involved organizations, if possible.
The Monterey Bay Aquarium’s Sea Otter Research and Conservation program has been studying and trying to save the threatened southern sea otter since 1984. They rescue, treat and release injured otters, raise and release stranded pups through their surrogate program, provide care for sea otters that can’t return to the wild, and conduct scientific research. Although SORAC focuses primarily on the southern sea otter, SORAC staff and volunteers collaborate with the U.S. Geological Survey and other scientists to study sea otters from Russia, to Alaska, to southern California. (http://seaotters.com/research-conservation/)

7.       State this organism’s ecosystem role (foundation, keystone, indicator species, generalist, specialist, etc.)

Sea otters are considered a keystone species because of the crucial ecological role they play in maintaining the health and stability of the nearshore marine ecosystem. Without sea otters, sea urchins and other herbivorous invertebrates are left unchecked to graze through swathes of giant kelp forests, creating barren stretches of coastal habitat behind them that once served as nurseries for fish, seals, and hordes of other sea life. Despite their short lives by plant standards, kelps siphon huge amounts of carbon from the atmosphere – what scientists call “primary productivity.” They take carbon dioxide from the air and turn it into sugar fuel with the help of sunlight and water, releasing oxygen back into the air. Thanks to Sea Otters, Kelp Forests Absorb Vast Amounts of CO2. (http://seaotters.com/2012/09/07/thanks-to-sea-otters-kelp-forests-absorb-vast-amounts-of-co2/)

8.       State and describe at least one ecological service this organism provides for humans and other species.
By controlling sea urchin populations which feed upon the kelp, they help to protect habitat for many other species including fish, birds and other marine mammals. Because they spend their lives in the nearshore waters, sea otters also serve as an excellent sentinel for pathogens and pollutants entering the ocean from the terrestrial environment. Seeing sea otters as sentinels helps us to realize the importance of what we contribute to the oceans. Human activities have the potential to increase disease transmission and the flow of pollutants into the marine environment, but with the otters’ help, we are building our understanding of nearshore ocean health. Working together, citizens and scientists can make the land to sea connection a positive one. (http://seaotters.com/2012/03/24/helping-to-save-sea-otters-and-how-they-are-helping-to-save-us/)

9.       Include an Internet link to one recent scientific article or story about this organism written or produced in the last year. Suggestions for sources include


§  Audubon Magazine
§  Defenders
§  Endangered Earth
§  National Geographic
§  NPR
§  On Earth Magazine
§  Science Daily
§  Science News
§  Sierra Club Magazine
§  The Nature Conservancy
§  Other conservation group publication or news sites that give fair reporting on endangered species



State the name of the publication and the article date along with the link.

Lee Moran with the New York Daily News on Thursday, November 6th, 2014 wrote an article about an orphaned baby sea otter getting a new home at the Chicago Aquarium http://www.nydailynews.com/news/national/orphaned-baby-sea-otter-new-home-chicago-aquarium-article-1.2001213

10.   State the Precautionary Principle in your own words. Be sure to do so with reference to ecology or biodiversity. This principle is applied to economics and all other sorts of other topics.
In the case of the sea otter, even though their fur is so valuable around the world we are not sure what will happen if we decide to not take action. The unknown is what is causing us to use the Precautionary Principle, because we are uncertain and it could be potentially dangerous.

Part 3 Costs-benefit Analysis

What to submit on your blog site
·       “Part 3” heading
·       Name of your “role” in the school debate
·       Answers to questions 4-7 (8 points)

A cost-benefit analysis is vital when determining whether or not to save an endangered species habitat or to follow through with urban development plans. They can be very complex, but ours is simple.

As you will read in the next web site, an urban-sprawling town of Tucson, Arizona has a school district on the northwest side of town with a high school that can operate effectively with just over 2,000 students. It now has over 3,000 students. The district bought a 40-acre parcel a few years ago to build a new high school to alleviate the overcrowding problem at the one high school; however, an endangered species might be living on the property.

1.       Read the story, "Owl Play," below.

2.       Find your name on the list below. This is the group you will represent at an arbitration hearing.

·       Students at the overcrowded high school                                         - Toni, Ben
·       Parents of students at the overcrowded high school                                    - Linda, Allison
·       Neighborhood residents opposed to building the high school       - Brody, Hailey
·       Neighborhood residents in favor of building the high school                      - Jessica, Jamie
·       School board members                                                                         - Angel, Renee
·       Defenders of Wildlife lawyers (http://www.defenders.org)        - Jennifer, Laney (Kaitlyn)
·       Construction workers in line to build the school                             - Jeremy, Corina                           
·       US Fish and Wildlife ecologists                                                            - David (just worked out for you                                                                                                                             to work solo)

3.       Instead of examining the impact of the endangered owl that is the subject of the "Owl Play" article, imagine that the endangered species that you researched above is the resident on school property.

4.       Create a list of at least three costs or three benefits or a combination of both for building the school from your group's point of view.  (2 points)

The hardest part about working as a construction worker in this day and age, especially in the heat of Tucson, is finding a home for these Sea Otters. How these Sea Otters got here, I have no idea, but we can’t start our job until we find these creatures a home.
- One nice thing I will give is that the cost to move these Sea Otters will probably benefit them more than hurt them. Tucson is far too hot for the otters and they need to be around fresh ocean water. It looks like this could have been the start of something that never got finished. They don’t live here naturally but they’ve made this their home. Luckily enough Sea Otters seem to adapt to new surroundings well and although this is far from their natural habitat, I feel that they will settle in nicely in the Ocean or at Sea World.
- To move these creatures, however, it’s going to take a lot. First we have to find out how they got here. Then we will need a vet to come examine the otters to make sure they’re healthy. Then we need to figure out whether or not we should release them into the ocean or whether it’s more beneficial for them to go to a wild life zoo. If it’s a zoo, what zoo would take them and would it be the best place for them. This cost alone is far from easy.
- One nice thing is that the students of the school can use these animals for research and as a mascot. They could, possibly, adopt them and take care of them. That way the otters don’t have to move and the school gets built. Not to mention, we construction workers, won’t be out of a job. It’s a win, win, win situation.

5.       Write at least two sentences in defense of each point. For each item in your list, identify the timing of each. For instance, does a particular benefit or loss occur immediately, or does it lie in the distant future? (4 points)

- One thing that is for sure is that we have to do something about the sea otters. If we leave them where they are and do nothing, they could end up worse off than they already are. Finding a safe home for them has to be a valuable option. Sea Otters don’t live in the desert naturally, and they need to be near their own kind. How they survived here this long is remarkable.
- Moving these creatures, regardless of how much it will cost, will benefit them far more than hurt them. Cost shouldn’t be an object, so long as they get taken care of. We’re not going to see them populate into a new species, if anything something worse can eat them. We can move them, with little harm, and they will be happier. So what if it costs and extra $50,000. Isn’t that worth saving these otters?
- Lastly, the win, win, win scenario is probably the best option that could come up. If we give these otters a new home, why not make the school the Tucson Amphitheater Sea Otters? Voila there’s a mascot. Need to figure out who can take care of them? Kid’s need a science department, build a salt water tank like at sea world and have the students take care of them. There’s the cost right there for “maintaining them”. Not to mention the students will love learning about Sea Otters and having these live animals on site will benefit the learning pattern and possibly create new marine biologists.

6.       Explain the meaning of “If you hear a hoot, this site is kaput.” (1 point)

“If you hear a hoot, this site is kaput” is referencing that building a school on an owl habitat is wrong. That the school district should find a better location, rather than building there.

7.       Describe a “404 permit.” (1 point)
A 404 permit is needed when a plan is in place to possibly put something into the clean water system. In this case the wash that was on the property, they were going to fill it and move it. But the plans changed so they won’t have to touch the wash. Therefor putting some sort of materials into the water wasn’t going to happen.




Saturday, April 4, 2015

Biotic Communities

The state I live in is also the state that I chose for my area of interest. I am a true Arizonan, born and raised in the desert to move to Flagstaff when I was 12 and been here ever since. Northern Arizona, Arizona for that matter, is filled with so many beautiful and amazing biotic communities. According to Google Earth, the area I live in, FOREST 122.3: PETRAN MONTANE CONIFER FOREST. I chose this because it’s my home town, figured I knew a thing or two about it. In the wintertime I often see this little bird around my place of work so I decided I’d look for the type it was, because I’ve never seen it anywhere else. The Dark-eyed Junco or Junco hyemalis can be found around woodland edges and suburban yards, feeding on the ground, making ticking calls as they fly up into the bushes. This little bird forages mostly while hopping and running on the ground. They eat mostly seeds and insects. Close to half of summer diet of adults consists of insects, including caterpillars, beetles, grasshoppers, true bugs, and others, also spiders. They feed heavily on seeds of weeds and grasses, especially in the winter. They live in conifer and mixed woods. I find them a lot in the bushes near my work. I’m sure I’m no the only one who’s found this little guy around.




Work Cited : 
"Guide to North American Birds" http://www.audubon.org/field-guide/bird/dark-eyed-junco

Monday, March 30, 2015

Wildlife corridor

Jeremy Sanders
Environmental Biology 105
Spring Semester 2015
Summary
Using a black bear corridor as a means to moderate some of the adverse ecological effects of habitat fragmentation for the Black Bear. This document discusses principles of evaluating and designing a wildlife corridor to facilitate use by black bears.
Introduction
The American Black Bear, or Ursus Americanus, can live in a variety of habitats. Because of their versatile diet, they inhabit both coniferous and deciduous forests as well as wide open areas. Currently, conservation efforts for black bears have been effective and in most areas, black bears are increasing and can sustain managed sport hunting. The key to successful co-existence between humans and bears is to recognize that it is no longer possible for either species to occupy all habitats but that where co-occupancy is possible and desirable. Most conflicts are the result of people unintentionally feeding bears, most often by allowing them access to household garbage or bird feeders. Although uncommon, black bear attacks on humans occasionally occur, especially in areas where they come in frequent contact with people and their food. Black bears can be found all over the United States. Black Bear habitat fragmentation leads to more human conflicts in Florida. During the week of April 22, 2014, between Ocala National Forest and Orlando, FL, human-black bear interaction made headlines. After a bear bit a woman in her garage. This problem is not new. Both bear and human populations in Florida have been growing since the 1970s.  
One temporal variation is when black bears become a nuisance because of their lack of food or fight for food. When humans and other animals fight for the same type of food is when black bears have a temporal issue. Their food habits are so in tune with other animals that sometimes the bears have no choice. Lucky enough the American Black Bear will eat a diversity of insects.
Creating this corridor, large enough to regulate the species, but also to avoid any spatial characteristics of an isolated bear. “The spatial memory and foraging strategies of four adult captive-born American black bears were explored in four experiments using a simulated foraging task. In the first three experiments, each session consisted of two phases separated by a delay: During the exploration phase, subjects foraged among a set of baited and un baited sites. During the delay, the same locations were re baited and subjects were released again and allowed to search the sites (search phase). In Experiments1a and 1b, different sites were baited each day and the interval between exploration and search was short (4 hr or 15 min). Subjects were not accurate at recovering the food items in either experiment. In Experiment 2, an “informed forager” paradigm was used in which one subject was given privileged knowledge about the location of the food during the exploration phase and was later released with an “uninformed” competitor during the search phase. The bears did not achieve above-chance recovery accuracy even in the presence of a competitor. In Experiment 3, the same two of four sites were continually baited and the bears were released simultaneously over a period of 20 days, with each baiting separated by 2 or 3 days. As a group, the bears’ foraging accuracy with repeated baiting and longer intervals approached greater than chance accuracy. Results suggest some limitations on bears’ use of spatial memory in captive environments, but reveal the potential for use of spatial memory over longer delays.” (Vonk)
When building this corridor there are some abiotic factors that must be taken into consideration. Bears depend on water and without water the bear’s won’t be able to survive for long and lose part of their diet which is fish. Not to mention fresh, clean, air. Without air, all things would stop living and the American black bear is no different. (http://americanblackbear96.weebly.com/habitat.html)
In some parts of the country we are noticing a decline in the black bear population. Black bears use trees for feeding and marking purposes, both resulting in cambial damage, which reduces growth rates and can increase mortality rates. This edge effect is strongly impacted by human activities including forest management and supplemental feeding. Another issue, also caused by humans, is with light pollution. While light at night can be beneficial, neutral, or damaging for individual species, its presence invariably disturbs ecosystems. For example. Some species of spiders avoid lit areas, while other species are happy to build their spider web directly on a lamp post.
Building this wildlife corrido will cause the impediment for black bears from their biggest predator, humans. The design with be based on the black bears core habitat to help the bear adapt to its surroundings well. Regardless of how man made this corridor will be, we will do our very best to utilize the topography the bears are already used to. That way when the bears wake up they won’t begin to have an instant drop in the birth rate.
We will be using this geographic isolation to help the increase in black bear population. Thus far, threats only exists in a few isolated places. American black bears are found through much of Canada, the United States, and the northern half of Mexico. This corridor is going to have to be somewhat of an adaptive management style. Bear populations are not going to remain the same. They’re going to change over time. One issue that we would like to avoid is the inbreeding of the black bear. The reason for this is, in general, it is quite bad for a population or an organism to be very inbred. There is a well studied, although, only partially understood phenomenon called inbreeding depression. This genetic interchange is helped when black bears kick out males from families to avoid them mating with females.
This corridor will assist with the black bear to live freely and to be able to hunt and sleep and mate in a matter that is not in any way disruptive towards humans or the other way around. The corridor will be home to species such as plants, reptiles, amphibians, birds, insects, and small mammals. There will also be a small, man made, river to allow fish to move up and down the river and to allow the black bears to catch the fish as if they were still in the wild. The corridor will be extremely expensive but we feel that doing this will start a snow ball effect to let the species thrive. Once we get the bears to a safe mark, we will re-introduce them into the wild. The important thing is to maintain minimal human-animal interaction. In Mexico all hunting seasons for American black bears have been closed since 1985, and the species is considered nationally endangered. The Louisiana black bear, a subspecies of American black bear, was listed as threatened under the U.S. Endangered Species Act in 1992 because of severe loss and fragmentation of its habitat. The wildlife corrido will need to have 15.8 million acres. 9.5 million that are already protected and 6.3 million acres of remaining opportunity area that do not have conservation status. The exact proportion of the opportunity area that needs to be protected for functional connectivity within the corridor has not yet been determined. Protected areas include 4.7 million acres of federal land, 4.5 million acres of state land, 162,776 acres of country and city land and 204,232 acres of private land with permanent conservation status. There are 1.46 million acres within the Corridor opportunity area that are high priority for conservation through the Forever program and approximately 600,000 acres that are priorities for conservation through US Fish & Wildlife Services Greater Everglades Program. The Corridor provides habitat for 42 federally listed endangered species, 24 threatened species and 15 candidate species. At the state level, there are an additional 176 species listed as endanged, 56 as threatened and 29 as species of special concern. Examples of threatened and endangered species include Crested Caracara, Everglades Snail Kite, Florida Grasshopper Sparrow, Florida Scrub-Jay, Red-Cockaded Woodpecker, Whooping Crane, Wood Stork, Florida Panther, West Indian Manatee, Green Turtle, Leatherback Turtle, Hawksbill Turtle, Gulf Sturgeon, Okaloosa Darter, Sand Skink, Eastern Indigo Snake, Frosted Flatwoods Salamander, Highland’s Tiger Beetle, Choctawatchee Beach Mouse, Piping Plover, Etonia Rosemary and Okeechobee Gourd. There are 992 named rivers and streams crossing the Corridor that include 1150 miles of designated paddling trails. There are also 920 miles of the Florida National Scenic Trail within the Corridor.







 

















Sunday, March 8, 2015

BENEFITS OF GENETIC DIVERSITY LAB


Answers to the following questions as you work through the virtual lab. (I put this section on top because I was having issues with adding the graphs and table from the lab site.)

 

a.       At the beginning of the virtual lab, you were asked to sort eight lizards into categories. What criteria did you initially use to make your groups? I separated them from Green and Brown lizards.

 

b.      Did you revise your criteria later? Why? Yes I did, because I didn’t quite (still don’t) know how to label them. But I chose the new set because I learned that there’s more to it than just green and brown or long legged and short legged.

 

 

c.       An adaptation is a structure or function that is common in a population because it enhances the ability to survive and reproduce in a particular environment. Provide one example and an explanation of one adaptation in the Anolis lizards.

 

Anolis lizards are some of the best examples of both adaptive radiation and convergent evolution. Populations of lizards on isolated islands diverge to occupy separate ecological niches, mostly in terms of the location within the vegetation where they forage (such as in the crown of trees vs. the trunk vs. underlying shrubs). These divergences in habitat are accompanied by morphological changes primarily related to moving on the substrate diameter they most frequently encounter, with twig ecomorphs having short limbs, while trunk ecomorphs have long limbs.   (http://en.wikipedia.org/wiki/Anolis)

 

d.      Provide one evolutionary explanation for why lizards living in the same part of the habitat (i.e., grass) would have similar characteristics.

Because some lizards radiate independently, mostly, producing the same set of habitat specialists, termed ecomorphs.  

 

e.       What is an ecomorph? Provide one example from the virtual lab.

All the lizards from the lab are ecomorphs. Pulchellus is one example of an ecomorph. Ecomorphs are species with the same structural habitat.

f.        How is an ecomorph different from a species? A species is a group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding. Ecomorphs is a species of Lizard.

g.       Explain how a particular body feature of one of the lizard ecomorphs from the virtual lab is an adaptation to their particular niche. The A. cristatellus normally stay in trees for protection. If a predator approaches, the male extends his dewlap and runs away. Some live under the sand.   (http://en.wikipedia.org/wiki/Puerto_Rican_crested_anole)


Data Table
1.     Your Measurements Table
Hindlimb Length
42.0 mm
48.4 mm
16.9 mm
30.9 mm
38.3 mm
46.0 mm
57.9 mm
15.6 mm
Body Length
48.3 mm
58.3 mm
34.3 mm
38.3 mm
41.8 mm
60.3 mm
63.7 mm
37.2 mm
Tail Length
112.7 mm
117.8 mm
40.1 mm
114.5 mm
146.1 mm
139.9 mm
128.9 mm
45.8 mm
Lamellae Count
45
31
25
32
29
46
31
21

 

Reference Measurements Table
A. evermanni
A. cristatellus
A. occultus
A. pulchellus
A. olssoni
A. coelestinus
A. cybotes
A. sheplani
Hindlimb Length
41.8 mm
49.0 mm
16.8 mm
30.8 mm
38.9 mm
45.5 mm
57.2 mm
15.2 mm
Body Length
47.7 mm
58.5 mm
34.3 mm
37.9 mm
41.8 mm
60.9 mm
63.3 mm
36.9 mm
Tail Length
113.0 mm
118.3 mm
39.8 mm
115.2 mm
147.2 mm
139.6 mm
129.1 mm
44.9 mm
Lamellae Count
45
31
25
32
29
46
31
21
Graph
46
0.91 mm
Continue
A. cybotes
31
0.42 mm
0.87 mm
A. coelestinus
21
45
0.83 mm
A. olssoni
A. evermanni
31
0.49 mm
A. cristatellus
25
0.81 mm
A. pulchellus
32
0.92 mm
Find the appropriate position on the graph for each species’ toepad lamellae counts and relative hindlimb length measurements. Then, drag each species name to that location. After you finish graphing your results, press "Continue" to see both graphs side by side.
Your Measurements Table
Open results table in a new window
Number of Lamellae versus Relative Hindlimb Length for Anole Ecomorphs
29
A. occultus
0.76 mm
Plotting Toepad versus Hindlimb Length
A.sheplani
Module 1: Ecomorphs
Back
↓  Drag  ↓
Relative Hindlimb Length
Lamellae Count
Attention
Continue Anyway
Redo Placement
The placement of the labels outlined in red do not match your measurements.
Attention
Continue Anyway
Redo Placement
The placement of the label outlined in red does not match your measurements.

Find the appropriate position on the graph for each species' relative tail length and relative hindlimb length measurements. Then, drag each species name to that location. After you finish graphing your results, press "Continue" to see a graph of toepad lamellae versus relative hindlimb length measurements.
Plotting Tail versus Hindlimb Length
Continue
Tail versus Hindlimb Length Measurements for Anole Ecomorphs
Your Measurements Table
Relative Hindlimb Length
Relative Tail Length
0.87 mm
0.83 mm
0.49 mm
0.81 mm
0.92 mm
0.76 mm
0.91 mm
0.42 mm
2.33 mm
2.02 mm
1.17 mm
2.99 mm
3.50 mm
2.32 mm
2.02 mm
1.23 mm
A. evermanni
A. cristatellus
A. pulchellus
A. occultus
A.sheplani
A. cybotes
A. coelestinus
A. olssoni
Open results table in a new window
Module 1: Ecomorphs
Back
↓  Drag  ↓
Attention
Continue Anyway
Redo Placement
The placement of the labels outlined in red do not match your measurements.
Attention
Continue Anyway
Redo Placement
The placement of the label outlined in red does not match your measurements.