Content with tag biodiversity .

Less abundant animal and plant species gather in ghettos in order to survive

Less abundant animal and plant species gather in ghettos in order to survive

According to the competitive exclusion principle, species with low competitive abilities should be excluded by more efficient competitors; yet, they generally remain as rare species. The positive and negative spatial association networks of 326 disparate assemblages was described showing a general organization pattern that simultaneously supports the primacy of competition and the persistence of rare species. Abundant species monopolize negative associations in about 90% of the assemblages. On the other hand, rare species are mostly involved in positive associations, forming small network modules. Simulations suggest that positive interactions among rare species and microhabitat preferences are the most probable mechanisms underpinning this pattern and rare species persistence. The consistent results across taxa and geography suggest a general explanation for the maintenance of biodiversity in competitive environments. información[at]ebd.csic.es: Calatayud et al (2019) Positive associations among rare species and their persistence in ecological assemblages. Nature Ecol Evol. DOI 10.1038/s41559-019-1053-5.


https://www.nature.com/articles/s41559-019-1053-5

Content with tag biodiversity .

Less abundant animal and plant species gather in ghettos in order to survive

According to the competitive exclusion principle, species with low competitive abilities should be excluded by more efficient competitors; yet, they generally remain as rare species. The positive...

Scientists identify 66 alien species that pose the greatest threat to European biodiversity

From an initial working list of 329 alien species considered to pose threats to biodiversity recently published by the EU, scientists have derived and agreed a list of eight species considered to...

New "Silk Road" brings challenges and opportunities for biodiversity conservation

China is establishing an infrastructure and service network to connect the country, by land and sea, to different parts of Asia, Africa and Europe. This Chinese project would then represent not...

Accommodation of developmental plasticity explains adaptive divergence among spadefoot toads

Phenotypic differences among species may evolve through genetic accommodation, but mechanisms accounting for this process are poorly understood. Here hormonal variation underlying differences in...
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