304 Answered Questions for the topic ecology

04/16/19

How can we calculate the minimum sustainable number of the panda population?
I have a degree in Biology so I'm a little embarrassed that I never learned this, but... How do we know 1600 Pandas isn't enough? I know that we have historical numbers (although I couldn't find... more
Follows • 2
Expert Answers •1
Ecology

04/12/19

Methods in researching loss of natural habitat?
What methods are there to research loss of natural habitat? I know of supervised image classification in GIS but what other methods are commonly used in research?
Follows • 1
Expert Answers •1

04/12/19

Are there species that occupy several roles in the food hierarchy?
Are there species that occupy several roles in the food hierarchy? By role, I am referring to producer, primary consumer, secondary consumer, tertiary consumer, quaternary consumer and so... more
Follows • 1
Expert Answers •1

04/12/19

Why are some berries poisonous?
In my understanding, the evolutional function of berries is to be eaten and pood out somewhere else, so that the seeds of the plant spread. Is this so? Then why are some berries poisonous?
Follows • 1
Expert Answers •1
Ecology Physiology Botany

04/12/19

How does a pine cone open?
When a pine cone is wet, it remains closed. However, when it's dry it opens again. From the perspective of physics or biomechanics, what is the mechanism that allows a pine cone to open and close... more
Follows • 1
Expert Answers •1
Ecology

04/10/19

What is the name of the new species of Orca Whale that was seen in the open waters of Chile?
New species of whale seen in ocean in Chile
Follows • 1
Expert Answers •1

04/06/19

What are the ecological effects of moderately high and prolonged concentrations of nitrogen deposition on an ecosystem?
There are many sources of nitrogen which eventually get deposited out of the atmosphere and onto the land/surface. Typically higher levels of nitrogen compounds are emitted near urban and roadway... more
Follows • 1
Expert Answers •1

04/04/19

Why do Arctic predators accumulate vitamin A?
Top predators in the Arctic are known to accumulate vitamin A, often to levels that are toxic for human consumption. A 2012 study by Senoo, Imai, *et al.* found that the livers of several predator... more
Follows • 1
Expert Answers •1

04/04/19

Smallest viable reproducing population?
What is the smallest viable reproducing population, such as in a human population. By viable I mean a population which keeps genetic defects low (enough). A very strongly related question: what is... more
Follows • 1
Expert Answers •2

04/01/19

Homeowners who live near bodies of water in the state of New Hampshire are asked to check all home cleaning products to make sure they do not contain phosphates. Why was this regulation put in place?
Follows • 1
Expert Answers •1

03/30/19

Was the recent "conservation hunt" of a black rhino supported by science?
CNN [recently covered](http://www.cnn.com/2015/05/19/africa/namibia-rhino-hunt/) a sanctioned black rhino hunt in Namibia by Texan Corey Knowlton, who bid US$350,000 for the license. In the story,... more
Follows • 1
Expert Answers •1

03/27/19

What is called the "area size that an animal usually lives in"?
What is called the "area size that an animal usually lives in" or "needs for a normal life"? Is there any specific term?
Follows • 1
Expert Answers •1
Ecology Volcanology Soil

03/27/19

Do volcanos really create fertile soil?
I'm developing an ecology for a portion of my world that's geologically active and I remembered hearing that volcanic ash in soil makes it more fertile to agriculture. After extensive googling... more
Follows • 1
Expert Answers •1

03/27/19

How did zootoxins evolve?
I've always wondered how toxins in certain organisms have evolved. Particularly, organisms that produce toxins as a deterrent to predators as opposed to organisms that use it to paralyze their... more
Follows • 1
Expert Answers •1
Ecology Marine Biology

03/27/19

Inexperienced divers damage coral, but parrot fish eating coral doesn't do damage?
I've been learning about life on coral reefs. Recently I've become aware of the damage to coral reefs caused by tourism and inexperienced divers: 1) Corals have a thin membrane which keeps them... more
Follows • 1
Expert Answers •1
Ecology Science Chemistry

03/25/19

Carbon footprint

The United States has roughly 250 million passenger cars for 320 million people. That equates to approximately 78% of all Americans owning a car. The vehicle population in China reached almost 300... more
Follows • 1
Expert Answers •1
Ecology Homework Gis

03/19/19

Categories for supervised classification, wildlife analysis?
I am using GIS to undertake a small research on the loss of natural habitat in north England. I will be using Supervised Classification where I train the system on a few examples, e.g. - shallow... more
Follows • 1
Expert Answers •1
Ecology Biology Botany

03/19/19

What damage results from forest fires besides the destruction of trees?
Follows • 1
Expert Answers •1

03/19/19

Is it theoretically possible to restore the Tiger population to 100,000?
The current global Tiger population is roughly 5100 according to Wikipedia. With habitat destruction and poaching continuing and no effective improvement in conservation, most likely the Tiger... more
Follows • 1
Expert Answers •1

03/18/19

Why haven't weeds overtaken the entire planet?
Given how rapidly weed plants spread and grow, choking out all other plant life, how come after millions of years we haven't ended with forests full of thistle or pokeweed, as opposed to pines or... more
Follows • 1
Expert Answers •1

03/18/19

Do plants have preference for the form of nitrogen as nutrient?
In the nitrogen cycle (ecology), it is usually described that plants can use nitrogen in the form of ammonium. Do plants prefer one form of nitrogen over the other?
Follows • 1
Expert Answers •1

03/18/19

Why does water stress lead to alkalinity of xylem sap in plants?
I was reading this book: Plant Physiology and Development, Sixth Edition by Lincoln Taiz, Eduardo Zeiger, Ian M. Møller, and Angus Murphy when this doubt came to my mind. Abscisic acid, the stress... more
Follows • 1
Expert Answers •1
Ecology Zoology

03/18/19

Why do bulls have a hump?
Camels have a hump as an adaptation to the heat. They store fat so that it minimizes the insulating effect the fat would have if distributed over the rest of their bodies. Why do buffaloes/ oxen/... more
Follows • 1
Expert Answers •1

03/14/19

Is there any example of living beings destroying their environment?
I had an argument with someone about mankind being the only being destroying its own environment. I don't think this is true, yet, I cannot provide any example of significant importance. Are there... more
Follows • 1
Expert Answers •2

03/14/19

If the oxygen in the atmosphere is always replenished by plants, how do the other contents of air get replenished?
Follows • 1
Expert Answers •1

Still looking for help? Get the right answer, fast.

Ask a question for free

Get a free answer to a quick problem.
Most questions answered within 4 hours.

OR

Find an Online Tutor Now

Choose an expert and meet online. No packages or subscriptions, pay only for the time you need.