Questions tagged [ecology]

The study of the spatial and temporal patterns of the distribution and abundance of organisms, including causes and consequences (Scheiner, S.M. and Willig, M.R., 2008. A general theory of ecology. Theoretical Ecology, 1(1), pp.21-28. doi:10.1007/s12080-007-0002-0)

Filter by
Sorted by
Tagged with
0
votes
1answer
24 views

Why do predatory mites have to be introduced multiple times?

I'm combating spider mite infestation using either Phytoseiulus persimilis or Amblyseius californicus. After extensive study of the literature, I'm still unsure why the producers of these predatory ...
0
votes
0answers
24 views

Is my understanding of the Bergmann's rule correct? (mass is secondary)

According to Wikipedia, Bergmann's rule applies because animals living in colder areas have greater surface-area-to-volume ratio. If I understand that correctly, the advantage of the bulkier bodies ...
0
votes
0answers
12 views

Tradeoff between pathogen adaptability and infectivity

Is there a kind of inverse proportionality relation between a pathogen ability to infect new hosts and its ability to evade the immune defenses/medication? The background: The question is motivated by ...
1
vote
0answers
17 views

Is a pampa an example of ecological succession?

I'm not very sure if a pampa is an example of an ecological succession. The reason of my doubt is due I've remember hearing that a Pampa is formed when a Valley which has had a river on it, no longer ...
1
vote
0answers
15 views

Where is a coacervate located in the levels of organization?

I'm confused about where to position in the hierarchy of the levels of organization of living things, the coacervate in the context of Oparin-Haldane's theory of the origin of life. In short, ...
0
votes
0answers
26 views

How does the availability of a reference genome aid in microsatellite analysis?

I'm planning to use microsatellites to examine fine-scale population structure between several breeding colonies of birds. Most of my DNA will be extracted from feathers and the yield isn't sufficient ...
4
votes
2answers
50 views

Why is the consumer/producer biomass ratio higher in the oceans?

According to Bar-on et al. (2018) (see figure 2), the terrestrial consumer/producer biomass ratio is 20/450 while the marine consumer/producer biomass ratio is 5/1 (in Gton of carbon). Why is the ...
2
votes
2answers
244 views

Do fish depend on plants for survival?

As far as I know, all land life depends on plants for survival. Plants convert sunlight to energy using photosynthesis, herbivores consume plants, and carnivores consume herbivores. All the energy is ...
-1
votes
1answer
39 views

How many giant kelp are there per square meter?

In a high-density giant kelp (Macrocystis pyrifera) bed how many "holdfasts" or roots would there be per square meter of seafloor on average?
0
votes
0answers
46 views

longest possible food chain

Food chains generally consists of three or four steps. There are some food chains containing five steps. What are the examples of food chains containing more than five steps and what is the longest ...
0
votes
0answers
19 views

What is the rate of bacterial cell death due to viruses on land?

"The rate of viral infection in the oceans stands at 1 × 10^23 infections per second, and these infections remove 20–40% of all bacterial cells each day." - https://www.nature.com/articles/...
1
vote
2answers
42 views

Techniques to find out which species are endangered

Most countries have a list of endangered species and international organisations too issue such lists of vulnerable and endangered species. What mathematical or statistical models are those estimates ...
1
vote
0answers
17 views

Optimal agriculture: maximum yield with minimum environmental impact

I read more and more stuff about alternative method of agriculture such as permaculture. Howerver, I'm not an ecologist or biologist so I don't know where to look for really good and serious articles /...
2
votes
1answer
119 views

Is this question about limiting factors answerable?

This is from a Singapore-Cambridge GCE O-level Biology exam (a national exam for 16-year-olds). The exam board maintains that the question is "correct and accurate"—but isn't there a typo in ...
1
vote
1answer
116 views

Why don't the female lions in a pride help their male lion to protect their children from other males?

I watched a dozen of videos taping the fights between male lions; none of them involve female lions assisting in the fight. It is also known that the male lion who take-over the pride will kill all ...
0
votes
1answer
37 views

rapidly growing mold on flat surface

For an experiment I'm conducting, I need to grow mold on a 2 foot square piece of white fiberglass. I'm in Florida, with high heat and humility, so mold already grows easily. I've seen elsewhere that ...
0
votes
1answer
351 views

Can a second mass extinction by microbes happen?

Science Daily reports that the mass extinction at the end of Permian period happened by the Methanosarcina archaea wiping out 90% of species: Methane-producing microbes may be responsible for the ...
0
votes
0answers
21 views

which of the two is the best method for presenting specimens in museum style?

A while back I had to preserve pieces of shrubs and trees then present them in a museum-style, for a course module at university. A friend of mine opted in sticking them to a white A3 page with PVA ...
7
votes
1answer
83 views

What is the fate of the typical tree?

Walking through the local established broadleaf forests dominated by oak and tulip poplar (Eastern U.S.), it is common to find patches of young tree saplings, say 10-20 oak or tulip poplar saplings ...
1
vote
1answer
70 views

What is the mass of carbon dioxide absorbed by an oak tree in one year?

I want to understand the environmental impact of oak trees due to absorption carbon dioxide. So my question is, what is the mass of carbon dioxide absorbed by an oak tree in one year?
0
votes
2answers
49 views

What is the defining characteristics of a Gap Species?

For the following competitive exam question: A road is constructed through a tropical rain forest, following which a population of a species of butterflies declines. Which of the following is NOT a ...
0
votes
3answers
90 views

What is the primary cause of death for small animals in urban and suburban areas?

Small birds (sparrows, robins, jays, finches) and mammals (squirrels, rats, opossums, raccoons) are a common sight in many urban and suburban communities with green space. However, I observe carcasses ...
0
votes
1answer
47 views

Is there any description about how microbes spread from a small place to a very large place?

Is there any materials (such as books, papers or others) about how microbes (such as the bacteria or virus) or a special kind of microbe spread from a small place to a very large area (such as the ...
0
votes
1answer
18 views

Phytomass and photosynthesis

I have been introduced to the term "phytomass" and I was wondering if phytomass can be both photosynthetic and non-photosynthetic?
0
votes
0answers
46 views

What allows diverse ecology to thrive despite forces reducing species diversity?

Ecology and business are a useful model for understanding one another. One species fills a niche until it is outcompeted by another just as one business fills a niche until it is outcompeted by ...
4
votes
1answer
54 views

On stochastic Lotka-Volterra predator-prey model

I am currently working (as a mathematician) on some estimations involving an stochastic predator-prey type model in which some of the coefficients have been perturbed by a Brownian Motion yielding to ...
0
votes
0answers
32 views

Should the fly rules of starlings flock belong to proximate reason or Ultimate reason?

Since for Proximate (or mechanistic), causation it should explain how actions occur in terms of the genetic, neurological, hormonal, and skeletal–muscular mechanisms involved. But fly rules does not ...
2
votes
0answers
40 views

Range for which the Verhulst-Pearl model is a good approximate

The Verhulst-Pearl model describes the growth of a population using the differential equation, $$\frac{dN}{dt}=rN \left(\frac{K-N}{K} \right)$$ where N is the population (no. of organisms), r, the ...
3
votes
1answer
80 views

CO2 availability to phytoplankton in oceans and climate change impacts

I learned through research that increasing levels of atmospheric CO2 was increasing the acidity level of ocean waters. I then was looking into how this was affecting the phytoplankton and read that ...
-1
votes
1answer
56 views

Analysing bird diversity data across 2 sites and 2 time periods - Ordinal data. Shannon's and Jaccard?

I am looking for the best way to analyse the data below to measure and compare the bird diversity between 3 sites and across 2 time periods - basically are they different from each other and have they ...
1
vote
1answer
34 views

Is the colour of a chrysalis predetermined?

Usually, chrysalis of butterflies camouflages with the surface it is attached to, for protection, as I understand it. There are exceptions, though; For example, the golden chrysalis of Euploea core is ...
2
votes
0answers
19 views

Are there any studies on the solar latitude limits of different plant species, beyond which they wouldn't thrive even with suitable weather?

Not sure whether this belongs here or in the Gardening & Landscaping StackExchange, but here goes... According to maps provided in the paper Present and future Köppen-Geiger climate ...
0
votes
0answers
107 views

Can unsegmented organisms be tagmatized?

this was something that I thought about if I can not find anything about this. I'm assuming it can be tagmatized like a spider; they have 2 tagmatations and im thinking its something like this?
1
vote
0answers
59 views

What happens to male turkeys?

My family and I have almost never seen a wild male turkey though we have seen countless female turkeys. Is the male to female sex ratio of turkeys at birth extremely low? If not, what happens to the ...
16
votes
1answer
4k views

Antibacterial soap impacts on septic system?

What impacts do antibacterial soaps have on septic systems? I know that septic systems rely heavily on bacteria (especially regarding the breakdown of wastes by bacteria), so it seems as though ...
4
votes
1answer
72 views

How does species diversity vs Earth total biomass relate?

Are there any laws/theoretical foundations about how diversity of species relate with total biomass on Earth? While there is a lot of esoteric sort of talk "humanity dis-balances the live on the ...
-1
votes
1answer
66 views

Where does the “para” in parasitism come from

He there. So in biology there is the concept of parabiosis, that describes a relationship where one part experiences a positive side effect and the other one has no disadvantages because of that. The ...
3
votes
0answers
34 views

What to do with this Araucaria sprout

I live in Santiago, Chile, and I see this Araucaria frequently: For what I have read, it seems to be a female A. angustifolia individual (leaves are 2-3 cm long and a few mm wide, with a very sharp ...
0
votes
2answers
93 views

Can the apparent drop in insect population be explained by local insects evolving to avoid traps?

In this widely reported Plos One article, it is stated that, after roughly 3 decades of placing Malaise traps in a set of predetermined locations (counting and replacing them regularly), a sharp ...
0
votes
0answers
44 views

Is there a Zipf law in epidemiology?

Are there cases where Zipf Law appears in epidemiology? I ranked provinces of China by their coronavirus confirmed cases (2020-01-30 14:29): 4586, 428, 311, 278, 277, 200, 165, 162, 145, 142, 129,...
1
vote
0answers
28 views

What do oxpeckers eat from thick-skinned hippopotamuses and rhinoceroses?

Noted for their thick skin are both rhinoceroses (1.5 to 5 cm) and hippopotamuses (6 cm). They are further noted for their symbiotic relationship with bird called an oxpecker: Both the English and ...
0
votes
0answers
32 views

How can I propagate a community of anaerobic bacteria sampled from mud in a bog?

I'm doing research on anaerobic bacteria. In the fall I took mud samples from a bog and have been working with them but I didn't take enough. Now winter has rolled around (Im in Canada) and all the ...
0
votes
0answers
31 views

Is feeding wild pigeons really “weakening the entire species”?

While reading about what foods are healthy for pigeons, I came across the following paragraph: (Source) Human interaction and improper feeding of domestic and wild pigeons is believed to be one of ...
1
vote
2answers
165 views

Lotka-Voltera predator prey model isocline?

In lotka voltera predator prey model, why do we get a straight isocline with variable prey/predator population for single value of corresponding predator/prey? I understand that we get the prey ...
2
votes
2answers
56 views

How to model species interactions on population size dynamic?

Here are two classical discrete time models of population size dynamic. The exponential growth model $$N_{t+1} = r\cdot N_t \qquad\qquad(1)$$ and the logistic growth model $$N_{t+1} = r\cdot N_t \...
1
vote
0answers
7 views

Why was the precipitation-streamflow correlation greater in the intact catchment at Hubbard BrookI

I gave an assignment and ran a class on this data last year. https://lifediscoveryed.org/r290/hubbard_brook_streamflow_response_to_deforestation Its a classic small watershed experiment where ...
1
vote
1answer
85 views

Confusion about Lotka_Volterra model for two competing species

Lotka-Volterra model for two competing species in Boyce's Elementary Differential Equations and Boundary Value problems' is given by: \begin{align*} \frac{dx_{1}(t)}{dt}&=r_{1}x_{1}-a_{11}x_{1}...
2
votes
1answer
77 views

Original Lotka–Volterra model

I am looking for the articles in which Lotka and Volterra published their original predator prey model. I couldn’t find the model presented in many textbooks in Lotka’s book Elements of Physical ...
-1
votes
1answer
33 views

Is the plant-human relationship a form of parasitism or commensalism?

We all know that mankind gets a lot of useful products for satisfying its needs from plants. They can be in the form of timber, fruits, oils, resins whatever. The plants don't seem to be benefitted ...
-1
votes
2answers
84 views

What is the relationship between r/K strategy and filial infanticides?

In other words, is the frequency of killing one's own offspring among species dependent on their location on the r/K strategy spectrum?

1
2 3 4 5
10