How Do Species Coexist? This week we focus on community ecology and further explore the interactions between species in an ecosystem. For instance, how does the decline in a population from an ecosystem (as was the case in Gorongosa) affect the other players?
F: Welcome to today's programme - the third in our series on living in space. I'm delighted to have with me in the studio Fred Lucatoni, who spent six months living on the International Space Station recently.
In the last decade, scientists have successfully grown mini-brains, known as "organoids," from human stem cells that differentiate into neurons and assemble into 3D structures. Right now, the work is highly theoretical, but "I think in the next decade, we'll know" whether it could work, he added.
Process variability and individual effects mean that many species have the advantage at different times and places even in the absence of "deterministic" trade-offs. Not only does colonization vary among species, but also individual behavior is highly stochastic and weakly correlated among members of the same population.
Jun 18, 2011 · The very existence of differences among species in traits and performance has been taken as irrefutable evidence that niche partitioning enables species to get along (coexistence). However, recent work has identified a class of models on the other extreme, called neutral models, because all species are indentical.
May 01, 2011 · The 24 May 1968 issue of Time magazine featured a short article with the title ‘Animal Behavior: Love at the Zoo’.Its topic was the breeding of animals in zoological gardens, but unlike the puff pieces featuring neonate mammals routinely fed to media by zoo publicity departments today, this story sought to highlight the unique dilemmas encountered on the way to such happy successes.
In stochastic niche theory, invading species become established only if propagules can survive stochastic mortality while growing to maturity on the resources left unconsumed by established species. Comparisons of stochastic niche theory and neutral theory suggest that neutrality is highly unlikely to explain patterns observed in species ...
Rising unemployment, working time reduction, temporary layoffs and job-search discouragement lead to an estimated drop in aggregate working hours of Figure 1. Estimated drop in aggregate working hours (Estimated percentage drop in aggregate working hours compared to the per-crisis baseline
1. Introduction. The past decade has seen several important advances in the search for explanations for the high diversity of tropical forests. These have included the development and testing of neutral theory (Bell 2000; Hubbell 2000), and the realization that plant natural enemies, particularly pathogens, may play an important role in limiting the degree to which one or a few species can ...
Aug 27, 2013 · Many groups have advanced our understanding of speciation and niche partitioning in terms of microbial biogeography, a particularly elegant story is that of Salinispora (see Paul R. Jensen’s article in this issue of Microbiology Today), yet we still have a long way to go. Work on global diversity of bacteriophages, evolution of viruses, co ...
A note on stationary age distributions in single species populations and stationary species populations in a community. Ecology, 39: 146-47. Population ecology of some warblers of northeastern coniferous forests. Ecology, 39:599-619. 1959 With G. E. Hutchinson. A theoretical ecological model of size dis- tributions among species of animals. Am.
Urbanization is one of the most intensive and rapid human-driven factors that threat biodiversity. Finding an indicator of species community responses to urbanization is crucial for predicting the consequences of anthropogenic land cover changes. Here, we develop a framework that relies on functional originality. A species is original or equivalently distinct, regarding its traits, if it ...
Scientists in Israel say they have conducted tests to successfully stop and reverse the biological ageing process. The tests were part of a joint project by Tel Aviv University and the Shamir Medical Center.
Feb 17, 2016 · The niche partitioning theory (Hutchinson, 1957; Paoli, Curran & Zak, 2006) argues that diversity exists because species partition the environment into unique niches that can vary over time or space, and these niche differences are essential for long-term coexistence.