Interactions and relationships among organisms and their environment. This includes biotic and abiotic (non-living/environmental) factors that impact organisms.

learn more… | top users | synonyms

5
votes
2answers
88 views

Evolution of spider webs?

Web making seems like a fairly complex behavior built from a pretty strong material. So how exactly did it evolve? Do we have any clues about what kind of features/behaviors preceded web making and ...
1
vote
2answers
80 views

Is this a simple Hardy-Weinberg problem?

Phenylketonuria is a severe developmental disability due to a rare autosomal recessive allele. Approximately 1 in every 10,000 newborns suffer from this disease. Calculate the frequency of the allele ...
3
votes
2answers
122 views

Do reptiles hunt?

I encountered the following passage in the book The Art of Interactive Design by Criss Crawford (bold formatting is mine): [...] From stalking and evasion to the chase, the [interaction between ...
1
vote
0answers
129 views

Species-area relation graph

When species richness is plotted vs area, the graph follows the equation : log S = log C + Z log A where Z is the slope of the line. Z values are usually in the range of 0.1 to 0.2 but if very large ...
0
votes
0answers
52 views

Hemiptera sp preimago?

Which species of Hemiptera is this preimago, seen in 2015 in Rome?
5
votes
0answers
221 views

What are the branches of system ecology?

What are the branches of system ecology that scientists research in nowadays? Or what can system ecology can applied to, or be used? I have read its Wikipedia page, but sadly it doesn't answer my ...
2
votes
0answers
77 views

Bergmann's rule and Allen's rule: endotherms and ectotherms

Surface area to volume ratio (in terms of heat conservation) is not the only mechanism, but it is still an important mechanism for explaining Bergmann's rule and Allen's rule. Given that, I want to ...
5
votes
1answer
146 views

The replicator equation vs the Lotka-Volterra equation

Background The replicator equation with $n$ strategies is given by the differential equation: \begin{equation} \dot x_{i} = x_{i} \left( \sum_{j=1}^{n} a_{ij}x_{j} - \phi \right) \qquad i = 1, ...
2
votes
1answer
41 views

Algae and greenhouse effect

Just a thought: the CO2 concentration is increasing . Due to a different but possible related phenomenon, the algal blooms are on the rise. We humans want to control both. But algae are the major ...
5
votes
1answer
47 views

Length of dispersal flight of European spruce bark beetle?

I'm interested in length of dispersal flight of Ips typographus. I can barely find some information about dispersal distances, height of dispersal flight, but not at all information about how many ...
2
votes
1answer
36 views

Trial pre-registration service that accepts non-clinical trials, or specifically ecology?

I'm in the early stages of designing a trial in ecology. I'm interested in pre-registering the trial, as suggested here. My concern is that all of the registries (that I can find) deal specifically ...
2
votes
1answer
50 views

How do we call a region of low carrying capacity?

I am looking for a convenient word to define a region of the landscape where the local carrying capacity (population size) for a given species is low but different from zero. The species is still ...
10
votes
1answer
478 views

Does the cell internal temperature changes in response to a change in external temperature?

Background Some species are homeotherm (internal temperature is not affected by a change in external temperature) and some are poikilotherm (internal temperature changes in response to external ...
6
votes
2answers
327 views

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 prey. ...
4
votes
1answer
72 views

History: Do evolutionary and ecological processes occur at the same timescales?

Classically, it was thought that evolutionary processes occurred at a much slower pace than demographic/ecological processes. Nobody, ever thought about incorporating both processes into the same ...
3
votes
1answer
316 views

Can I compare Shannon-Wiener diversity indices between plots of different sizes (area)?

Can I compare the Shannon-Wiener (a.k.a. Shannon-Weaver) Index of diversity ($H'$) of plots (communities) with varying sizes (areas)? If not, what steps do I need to take and/or which tests should ...
6
votes
2answers
107 views

How do animals end up in remote areas?

I was thinking specifically about random marshy water holes on farmers fields. It seems that you can visit just about any one of these and you will find frogs if you look hard enough. They usually ...
2
votes
0answers
21 views

Will bark-beetles infest the Methow Valley?

What is the Methow Valley (esp. Winthrop, WA) area's susceptibility to bark beetles? Did the 2014 Carlton Complex wildfires increase the vulnerability due to the large numbers of dead, dying, and ...
8
votes
1answer
175 views

Database of Geographic Range of Species

Is there a database of organisms which would contain their queriable geographic location? I would need to perform a rather simple query, such as ...
19
votes
1answer
1k views

Can beavers control the direction a tree falls?

We humans can easily control the direction a tree falls by making a number of strategic cuts, essentially creating a hinge: This prevents trees from falling on equipment and people and sets them up ...
6
votes
1answer
175 views

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 ...
5
votes
1answer
119 views

How to gather life-history traits data on bird species?

I am looking for a data base of life history traits for bird species. Is there such data base? If not, what are your advice on how to collect those data? Is there a handy website that list ...
4
votes
0answers
51 views

Negative association between habitat quality and reproductive success in birds

I'm looking for bird studies that have found either a negative correlation or no correlation between habitat quality and reproductive success. Or in other words, bird studies that have found that ...
4
votes
2answers
952 views

Could we slow down life? [closed]

As far as I know there is no absolute time measurement (one that would measure time in a non-environment-dependent fashion) in any life form. Only such time measurements exist, which are dependent ...
7
votes
0answers
238 views

What bacteria shed harvestable energy from root zone organic matter?

I recently heard of a successful effort that harvests energy from soil at plants' bases due to apparently bacterial breakdown of wastes from the plants: Via photosynthesis a plant produces organic ...
8
votes
1answer
3k views

How should species density be calculated for a clumped distribution?

Lets imagine 5 plots of different size are sampled for a target species: ...
4
votes
1answer
277 views

How can omnivores be in more than one trophic level?

I'm learning about the ecosystem and its relation to organisms, So organisms in a food chain can be put from producers to tertiary organisms. I just don't get the part where an organism can be labeled ...
6
votes
1answer
103 views

Viruses selected by evolution

First let me apologize in advance for I know almost nothing about biology. I had a conversation today with a family member who is a bio-computer-scientist and he talked to me about what his colleagues ...
0
votes
1answer
246 views

Are Humans Considered Keystone species? [closed]

Do humans have a huge impact on the ecosystem ? is it possible for other animals to live without us ?
3
votes
2answers
391 views

How does ecology differ from biology?

What precisely is ecology? How does it differ from biology? Because I never studied biology after high school, please explain as if I were 10 years old. I only know that ecology is a subset of biology ...
18
votes
2answers
300 views

Was the recent “conservation hunt” of a black rhino supported by science?

CNN recently covered a sanctioned black rhino hunt in Namibia by Texan Corey Knowlton, who bid US$350,000 for the license. In the story, he claims that the hunt was actually supporting conservation of ...
2
votes
1answer
311 views

What does the energy in an energy pyramid represent?

Suppose the energy at the second trophic level as given in an energy pyramid is 100 kcal per square metre. It could mean either of the two following things: 100 kcal is the energy this primary ...