Questions tagged [ecology]

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

65 questions with no upvoted or accepted answers
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794 views

Squirrel nest construction

I've often wondered how squirrels -- specifically, eastern grey squirrels (Sciurus carolinensis) make their nests. Specifically, I've been curious about how they "weave" everything together to make ...
6
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1answer
500 views

Phoresis and mechanical vectors

According to wikipedia and Human Parasitology By Burton Jerome Bogitsh, Clint Earl Carter, Thomas N. Oeltmann Phoresis: In this type of symbiotic relationship, the phoront, usually the smaller ...
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76 views

What is the thickness of the biosphere?

In other words, what is the vertical distance between the deepest and highest point on Earth where life is found? Life has been discovered at the bottom of the Mariana Trench, 13 km below sea level. ...
5
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146 views

Escaping resource limitations during tumor evolution

In their discussion of the importance of r- and K-selection on tumors, Aktipis et al. (2013; figure 3) provide the following illustration of a hypothetical cancer growth curve: In it, you can see ...
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124 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 ...
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81 views

Devonian Fish Diversity--What Would it Have Looked Like?

For 70 million years, the oceans, lakes and rivers of the world teemed with seven groups of fish: Placodermi Acanthodii Agnatha Chondrichthyes Sarcopterygii Actinopterygii Now two of those ...
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38 views

What do groundhogs and other subsurface-tunnel dwelling creatures do in heavy rains to avoid harm?

I notice groundhogs and many other tunneling creatures in my yard, the same yard which became pretty flooded during heavy rainfall. I don't see wildlife out during rain storms, but not long after, ...
4
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72 views

What is the effect of pesticides on worm growth?

As a new semester begins, we were asked to propose ideas for investigatory projects. Our idea revolves around the effects of pesticides on non-target organisms. Since frequent use of pesticides may ...
4
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1answer
52 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 ...
4
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102 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 ...
3
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72 views

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 ...
3
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37 views

What's the lowest atmospheric pressure a tardigrade can remain active in?

I'm not asking what atmospheric pressures they can survive (we now they can survive the vacuum of space) I'm wondering at what point a deficit of atmospheric pressure would cause them to enter one of ...
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38 views

Why is this spider wound in such a dense web?

I saw this thing yesterday on my window curtain, and I've been wondering what this is. It looks like a dense network of spider web, and the spider inside it is visible. I thought the spider was dead, ...
3
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0answers
15 views

Does trapper/hunter harvest reflect abundance or community composition?

I'm working on a study where a single professional trapper removes furbearers and corvids (who the trapper is changes annually). I would suspect that the composition of the harvest would be strongly ...
3
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0answers
85 views

Is there any example, where cooperative behaviour of predators induce fear in prey population?

I am basically from math background and doing Ph.D in mathematical biology. So I am not so efficient in biology. But my problem based on cooperative behaviour of animals during hunting which is ...
3
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140 views

How did fig tree take root in trunk of palm tree?

Please see pictures below. I never saw anything like this. Do the roots of the fig tree penetrate the trunk of the palm tree? Is there a symbiotic relationship between the two?
3
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75 views

Should you perform an ordination (such as PCA) of abiotic variables before a Redundancy analysis (RDA)?

I have a dataset of viral 'OTUs' across various sample points from different sites/times. I also have meta-data collected at these same sample points, for things like temperature and the ...
3
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197 views

Why does Fallopia Japonica not cause issues in Japan to where it is native unlike other countries?

Fallopia Japonica (also known as Japanese Knotweed), is currently causing a huge issue in the English countryside where it was introduced. This is due to the fact that it spreads and grows rather ...
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56 views

Why some plants flower in different seasons

I know how it work (Photoperiodism) but i wonder why all plants can't start flower in spring? Is it connected with ecological niche?
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158 views

The mechanism of the evolutionary rate hypothesis

There are several hypotheses for explaining the latitudinal gradients in species diversity (link). Of which, the evolutionary rate hypothesis states that warm temperature increases the rate of ...
3
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0answers
118 views

Terrarium Compatibility: Millipedes with Carnivorous Plants?

I have a child that loves his large millipedes (Desert Millipedes) and Venus Fly Traps. He's also been wanting to get some Sundew Savages. Given this little collection and his real enjoyment of ...
3
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0answers
71 views

Pattern in parental care behaviour from lower to higher animals?

I was studying about parental care behavior. There seems a pattern present in this behavior in case of vertebrates. The more evolutionary advanced class the animal belongs to, the greater effort an ...
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48 views

Names for the degrees for symptoms from drought (or other damage) done to trees

Looking out my window, I see trees suffering from drought. I once knew the name for the degrees visible, but I have forgotten and can't find it on the net. Attempt at describing "level of dryness" ...
3
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0answers
31 views

Classification of degree of infested areas by pine processionary moth on regions

I'm making a thesis about pine processionary moth distribution on the regions of algeria! i'm making tests about if there are spatial autocorrelation of this insects on the regions. and i'm doing ...
3
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1answer
698 views

Does the edge effect promote biodiversity?

I define the edge effect as: A term used to describe what occurs at habitat boundaries where two bordering communities influence one another. My question is whether it generally leads to an increase ...
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26 views

What does it mean for Caenorhabditis species to be “pseudoparasitic”?

In this Wormbook chapter, Kiontke says that some Caenorhabditis species live "pseudoparasitically" on warm-blooded animals. What does it mean? What is a pseudoparasite? I understand a parasite to be ...
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0answers
27 views

What accounts for the apparent lack of biodiversity in “bamboo forests”?

While hiking on the Hawaiian island of Maui, I passed from a forest with normal variety in trees and other flora, to a "bamboo forest" area in which the only plants that I could see were bamboo. This ...
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30 views

Why don't acacia trees prefer increasing tannin levels in their leaves rather than leaving them high?

According to this article, the Acacia tree has a chemical defence system which leads to the release of ethylene in the surroundings when a herbivore grazes on it. This leads to an increase in tannin ...
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0answers
34 views

Is there any standard of notation for ecological diagrams?

General Question Is there any convention of how to express different types of relations (e.g., eats, turns into, is beneficial to) and agents (e.g., species, nutrient) in an ecological diagram? I ...
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25 views

Is the inhalation of ammonia a possible health problem for bats in an artificial small volume winter roost?

About 70 bats (Nyctalus noctula) spend their winter in an artificial small volume (0,050 cubic meters) winter roost located in the attic of a building. There is a single small exit to the outside ...
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209 views

What is the biology behind human population dynamics?

A paradox: Human population growth looks a lot like a simple logistic growth pattern. But the simplest interpretation of logistic growth doesn't seem to fit. Is this peculiar to humans, or does it ...
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0answers
44 views

Is there a name for dominant-intraspecific competition?

Some ecological competition dynamics have particular names (e.g.: scramble competition, contest competition, ...). I wonder if there's such a name for competition dynamics where the interspecific ...
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0answers
73 views

A question about a succession study by Chapin et al. (1994)

The succession study in Glacier Bay, Alaska (Chapin et al., 1994) is an example that is used in almost all introductory texts on ecological succession. In the study, the effect of each succession ...
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0answers
38 views

Stable isotope sample preparation: Bone Collagen

I am performing research in which I need to extract bone collagen from the foot bones of American Beaver (Castor canadensis). I have read through the literature fairly thoroughly on both the ...
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0answers
397 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 ...
2
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0answers
48 views

How do climate and location affect the Pine Processionary moth?

I have statistics on the occurence of the Pine Processionary moth (Thaumetopoea pityocampa); we have the regions that are located in Algeria, infested area in percent, the defiliation degree (small, ...
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0answers
50 views

phosphorous availability to mycorrhizae and parent plant, timing - paper search

I'm researching phosphorous uptake in monocots to develop planting mixes for riparian planting. I recently saw a paper suggesting (the author lacked proof) that root zone mycorrhizae may solubilize ...
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13 views

Does the preservation fluid (ethanol or formaldehyde) leach heavy metals from mollusc tissue?

In a thread on researchgate, the concern was raised that long term exposure to unbuffered preservation fluids such as ethanol or formaldehyde may leach heavy metals from biological samples due to a ...
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0answers
31 views

Inequality factor for similarity sensitive diversity

In a research article, Lou Jost has introduced the concept of inequality factor. The paper is "The relation between evenness and diversity", published in 2010. Inequality factor allows an intuitive ...
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0answers
39 views

What's the lowest temperature a tardigrade can remain active at?

There's a lot of information floating around the net about how tough they are & what they can survive, like "We now know that some tardigrades can tolerate being frozen to -272.8 °C". But any ...
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0answers
43 views

How to quantify the strength of social bonding between the individuals of a colony? How to compare the strength of social bonding across the species?

Consider two different species of honey bees. If I have to compare the strength of social bonding between the two species i.e. in which species, social bonding between the individuals is stronger than ...
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0answers
41 views

Why are there so many species of large predator on the African savanna?

On the tropical grasslands of Africa, there are loads of large carnivores. Lions, cheetahs, leopards, hyenas and wild dogs are all found, sometimes, in the same place. I was wondering, why is it that ...
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0answers
32 views

How long does it take to extract a tree core for dendrochronological analysis

I'm going to do research in the tropics and am considering using tree cores for part of my analysis. However, for my planning: How long does it take on average to extract a tree core of a tree with ...
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33 views

How would you find and cultivate specific forms of algae?

Knowing how simple and efficient it is to grow algae, I started wondering how a person would specifically isolate and grow different strands of algae. Say I walk to the closest body of water and took ...
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0answers
40 views

It is correct to construct tree species-based rarefaction curves for birds?

If I register all the species of birds that uses sp1 tree, then, all the species of birds that use sp2 tree, and so on. With this dataset, I can made a rarefaction curve using "number of tree species" ...
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0answers
13 views

Why do some trees flower year round, others only once

Depending on latitude, rains, and pollinator behavior, etc. some trees flower only once a year such as oak trees, others twice (such as pipe organ cati as a response to pollinating bats) and yet ...
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23 views

Have there been any study that document the evidence of the changing ratio of the biomass of different trophic levels?

You would expect a number such as the producers (photosynthetic) biomass to consumers + decomposers biomass ratio is a very important indicator for sustainability. It is also very probable that the ...
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0answers
110 views

Species density project

I am working with data that was collected by an NGO over a 2 year period observing an arboreal primate. Over that period 1797km of survey effort was made within the core habitat area (measured from a ...
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0answers
14 views

Why is a butterfly actively looking for cool, dark spot, long before dark?

Here in Croatia, the Woodland grayling Hipparchia fagi flies constantly in the garden of my holiday home. Yesterday, I observed that one of these bufferflies was actively looking for a cool/dark spot ...
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230 views

Structure of an Ecosystem

Changes in WHICH of the following factors will result in a change of an ecosystem's structure and composition? A: nutrient availability B: temperature C: number of trees D: light ...