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

6
votes
1answer
95 views

Has Colony Collapse Disorder (or its equivalent) been noted in other species?

Colony Collapse Disorder is a well studied phenomenon relating to the decline of bee populations - has this disorder, or its equivalent, been observed in other colony-based species?
3
votes
1answer
255 views

Parasitism and mimicry

I was reading this article which states this: Classical Batesian mimicry, in which an undefended mimic evolves to look like a toxic model, is a parasitic relationship in which the mimic gains ...
3
votes
1answer
54 views

In which month should I map maritime vegetation?

I'm studying habitat use by Brent Goose in the UK, a species that feeds on maritime vegetation. It's main food types are Zostera sp., Ruppia sp., Ulva / Enteromorpha sp. and Puccinellia sp. I plan to ...
2
votes
1answer
270 views

Why Can Varied Species Live Together in Particular Ecosystems?

Consider the following question: The Piney Woods of Eastern Texas is home to a wide variety of organisms ranging from the grass Longleaf Oats to coyotes. Which of the following best explains why ...
1
vote
1answer
120 views

Calculating photosynthetic efficiency

While calculating photosynthetic efficiency, do we take into account the Gross Primary Production or the Net Primary Production ?
6
votes
3answers
412 views

Is there a hypothesis that attempts to explain patterns of species richness along all three energy-related environmental gradients?

My question is related to one of the oldest question in ecology: "What determines global patterns of species richness?". However, I want to focus on one particular part of this question, which has ...
4
votes
1answer
63 views

Generalism - specialism index in microbial ecology

I am doing research in Lipid metabolism in different yeast species and I would like to look into ecology of them. I would like to classify them to a Generalist/specialist based on different ...
1
vote
2answers
1k views

Definition of “Niche Complementarity”

What does "Niche Complementarity" means? On this website they define "Niche Complementarity" as: The tendency for coexisting species which occupy a similar position along one niche dimension ...
1
vote
1answer
84 views

Are these bat social calls?

I'm currently researching bat social calls (not echolocation calls) and have been given a series of samples (in .wav format) and wanted to know, if what I can hear is actually the social calls. Below ...
4
votes
1answer
79 views

How much cost would artificial pollination add to common products (fruits etc.)?

I've read about ecosystem services and their possible valuation - statements like "honeybee pollination service in the US is worth 1.6 billion dollars". Is data available on how this would affect the ...
5
votes
2answers
127 views

Is there theory that connects longevity, time-scale of environmental disturbance, and adaptation?

I'm thinking here about environmental disturbance or like climate change-driven warming. It seems as if there are two macroevolutionary ways to deal with environmental change: 1) Have short ...
6
votes
1answer
147 views

Can jellyfish improve Black Sea environment?

According to this study, cited by many popular science magazines, jellyfish and other, smaller animals can contribute to the vertical ocean stir as much as currents do. Black Sea chemistry and ...
1
vote
1answer
101 views

Determining limiting nutrients from a graph

The question was Which of the following statements is supported by these data? A. Phosphorus was the first limiting nutrient followed by nitrogen. B. Nitrogen was the first limiting nutrient ...
1
vote
1answer
86 views

Niche overlap Index

I wanted to use the compana() function from the adehabitat package. I don't really understand the meaning of the data in the ...
2
votes
1answer
339 views

What are the visual, behavioral similarities and differences between Yellow Fever Mosquito (Aedes aegypti) and the Tiger Mosquito (Aedes albopictus)?

The Tiger and Yellow Fever Mosquito visually look very similar. Recognizing the difference is important for tracking and controlling the spread of Yellow Fever, Dengue fever and other diseases. ...
4
votes
1answer
118 views

Natural enemies boost deep evolutionary fitness?

"Two species that reduce one another's fitness on microevolutionary (short-term) timescales can increase each other's macroevolutionary (long-term) fitness" Opinions? Intuitive Examples: ...
2
votes
2answers
139 views

Interdependency between organsims on our planet and its relation to ecosystem?

I am not a biologist but I just wonder if all species are interdependent. I mean if the tiger becomes extinct does it affect the ecosystem? If the mosquito or mouse become extinct does it affect the ...
4
votes
2answers
484 views

Could be an union/synergy between Math, Computer Science and Marine Biology?

I'm studing for my bachelor's degree in Natural Science and I have to chose the path for my future life. I have to chose the right kind of graduate studies. Since I love computer science, maths and ...
1
vote
1answer
96 views

How do I compare the variance of a distribution of species in one area versus another?

It's possible that this question is better suited for stack overflow, but I think the ecologists on this site might be better equipped to answer it. I'm trying to study two geographically-isolated ...
6
votes
3answers
247 views

If I built a concrete pool, would it ever contain fish?

Imagine that I built a concrete-walled pool the size of a football field and filled it with fresh water - obtained from another lake but free of bacteria, plantlife, eggs, etc. Would it ever, over ...
5
votes
1answer
205 views

Definitions and examples of some math-releated ecology branches

I would like to have an example of application and a brief description/definition (two or three lines) of the following fields. I would like to understand the exact differences between them. Other ...
2
votes
1answer
52 views

How do you estimate global species richness?

I know how estimates of species richness in a small area are made. But how do you estimate the total number of species on a global scale? One example of such a method can be found in Mora et al. ...
1
vote
1answer
155 views

Standardized Selection Ratio (SSR)

In this article the athors used the Standardized Selection Ratio (SSR) in order to infer what is the preferred host (anemone) of anemonefish. Here is a quotation coming from their methods: ...
3
votes
1answer
895 views

Index of ecological niche overlap

For this question I am interested in the Pianka's Index of ecological niche overlap. What is the Pianka's Index? How does it work? How can one calculate this index? How often is it used? In what ...
1
vote
2answers
157 views

Which statement about phenotypic plasticity is false?

This was a test question, and I'm not too sure about the answer. Which statement about phenotypic plasticity is false? a. Because the plasticity of a phenotypic trait may be costly to maintain, it ...
2
votes
0answers
46 views

Shortest route for a Nitrogen atom from fossil fuel to a protein in your body? [closed]

Millions of years ago fossil fuels originated from plants. A nitrogen atom from fossil fuel is now inside in a protein molecule in your body. What is the shortest path that the nitrogen atom ...
11
votes
3answers
333 views

Most suitable biodiversity index

I am conducting an investigation into the effect of two different grass management techniques (grazing vs. machine-mowing) upon floral biodiversity. I have collected my data and now need to process ...
6
votes
1answer
95 views

Is there a website that shows population sizes?

I'm looking for a website that shows the population sizes of a species (doesn't matter which) as a function of time at a geographic coordinate. Is there a government website or other free database ...
3
votes
2answers
475 views

Survivorship Curves: Type II curve mortality rate is not constant?

In graphs of survivorship curves, I'm seeing that the Type II curves are straight lines, and the supplementary text says that the mortality rate is constant (i.e. the slope of the line is constant). ...
2
votes
0answers
109 views

Mesophytic Climax community in succession?

My textbook says that in all cases of ecological succession (xerarch, hydrarch, etc.), the ultimate climax community, assuming constancy of environment, is a mesic community. Xeric or hydric pioneers ...
2
votes
2answers
209 views

Change in conditions of an ecosystem lead to change in organisms

Let's think about the slash and burn method and its effects on the ecosystem. Cutting down trees that rise all the way up to the canopy would expose the plants at ground level to more light, so would ...
3
votes
2answers
110 views

How would ecology be affected if 100km² of an ocean surface was covered by a floating object?

Assume that we planted floating solar cells on the ocean surfaces. Assume a 100km² solar cell field in the middle of the Pacific Ocean. All of the sunlight will be blocked by them. How would that ...
4
votes
2answers
323 views

Ecomorphs as evolutionary definitions

There have been demonstrations of ecomorphs in different taxa, where each morphology type is associated to a single environment. I know that it happens because special morphological characters ...
24
votes
2answers
576 views

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 ...
5
votes
2answers
167 views

Difference between biological control and introducing species for conservation?

I have a biology assignment and we have to explain various methods and strategies for conservation, two of which are: Biological control Introduced Species What is the difference between ...
5
votes
1answer
275 views

Are there any side-effects from a mosquitoes extinction?

Suppose that we have the ability to make mosquitoes extinct, what would the side-effect of such extinction be other than the fact that there won't be any mosquitoes left? Is it worth it to make ...
3
votes
0answers
77 views

Food Intake versus ability to flee among birds, particularly the hummingbird?

Logically speaking, if a hummingbird drinks too much nectar, it will be temporarily overweight and less able or unable to fly to escape danger. However if the same hummingbird doesn't drink enough ...
1
vote
1answer
49 views

Introductory text for primatology

I'm looking for a book that provides a good overview of primatology, one aimed more at researchers rather than a popular science book. Ideally, I'd like something with an ethology/ecology angle with ...
3
votes
2answers
813 views

Does finite rate of increase depend on mortality of individuals in a population?

As written in my lecture handouts, there two main factors in the Geometric Growth Model of populations: $R_{0}$ is the expected lifetime reproductive output. This way, for unicellulars, for example, ...
9
votes
2answers
116 views

Where can I find historical data on world-wide ecology parameters?

I hope this is the right StackExchange forum for such a question. I'm looking for large data sets on world-wide ecology parameters, such as annual temperatures by latitude, annual rainfall, CO₂ and ...
3
votes
2answers
52 views

Are there inherent problems in simulating marine environments, as compared to terrestrial systems?

We cultivate a number of terrestrial organisms in greenhouses and stables where they live in completely artificial environments. This seems to extend far less to marine organisms, such as fish. ...
2
votes
1answer
82 views

What causes tree lines?

There is an area of where there is a distinct line of only trees on one side and only shrubs on the other (right next to each other). What could cause this? My attempt: I said there could be a ...
4
votes
0answers
66 views

Does preservation in ethanol alter leaf litter mass?

I have benthic samples that were collected with an Ekman dredge from some small ponds. The samples contain quite a bit of coarse particulate organic matter (CPOM, basically dead leaves). I would ...
7
votes
2answers
161 views

Can allelopathy succesfully be used against algal blooms?

Algal blooms caused by man (harmful algal blooms) are a major ecological problem. An excessive amount of algae causes hypoxia and logically, most marine wildlife can't be sustained in hypoxic ...
5
votes
1answer
99 views

Are there known minimal marine ecosystems that are stable?

A more entertaining phrasing of the question would be "what would a marine ecologist put into a perfect aquarium?" I was reading about Prochlorococcus, among other photoautotrophs, and found that ...
5
votes
3answers
134 views

Does the entire surface of the earth contain organisms?

Does the entire surface of the earth contain organisms? My teacher mentioned that in some parts of the earth, there aren't any organism. Is this true? Thanks in advance.
3
votes
1answer
165 views

Statement about Tropical Rainforests

I made a statement about tropical rainforests, and I want to know if it's somewhat true or not: The soil in tropical rainforests is not exceptionally fertile, because it contains few minerals. The ...
2
votes
1answer
98 views

What does self-preservation stem from? [closed]

Self-preservation, or preservation anyway, probably happens throughout the animal kingdom, and perhaps through the plant kingdom as well (some plants/trees, apparently, produce chemicals to repel ...
4
votes
2answers
227 views

Is there a good field methods book that covers terrestrial ecology?

In the past I have used Limnological Analysis by Wetzel and Likens and Methods in Stream Ecology edited by Hauer and Lamberti to develop labs and research methods for courses and projects with an ...
2
votes
1answer
59 views

What type of biome is this?

There is a region that gets about 812mm of precipitation and is mildly hot all year long. I believe this region is a tropical savanna, but I'm not 100% sure. Is this correct?