colder and more seasonal landscapes, including theAlpsand the Arctic. Like other families of large mammals that colonized extreme Ice Ageenvironments, deer diversified and evolved into grotesque giants that had ornate coat patterns and large, bizarre antlers, which could grow only from nutrient-rich ...
Rattlesnake, any of 33 species of venomous New World vipers characterized by a segmented rattle at the tip of the tail that produces a buzzing sound when vibrated. Rattlesnakes are found from southern Canada to central Argentina but are most abundant in
Should humans kill members of one bird species to help protect another? That’s the question scientists and conservationists are struggling with right now in the Pacific Northwest. In a bid to save northern spotted owls from extinction, the U.S. Fish and Wildlife Service (USFWS) has suggested...
It may be particularly interesting to test how occasional historical introgression, as occurs in some butterflies88and cichlid fish89, versus ongoing gene flow affect the evolution of the speciation continuum. Further studies in other systems that combine estimates of components of RI with genomic diff...
S2). Having numerous plant traits that are related to a single response variable is not surprising since all these traits form the well-known Plant Economics Spectrum (PES;49,50). The PES describes how all plant functions are dependent on each-other, implying trade-offs and high levels of ...
上文“Furthermore, ginkgo trees are born with protective biochemical characteristics, in the form of hormones, antioxidants, and bactericides.(此外,银杏树天生具有保护性的生化特性,以激素、抗氧化剂和杀菌剂的形式出现)”说明银杏树天生有优点,下文“Also, they have evolved adaptations that enable them to...
and each sequence aggregated into 200-year long contiguous time windows. Proportions of sites allocated to each of eight land-cover classes within each 200-year time windows are summed to the three broad classes ‘forest’, ‘semi-open’ and ‘open’ vegetation. Plot (b) shows that total for...
Did you know that humans aren't the only species (物种) that use language? Bees communicate by dancing. Whales talk to each other by singing. And some apes talk to humans by using American Sign Language. A female gorilla (大猩猩), Koko, was born at the San Francisco Zoo on July 4th...
Keystone species, in ecology, a species that has a disproportionately large effect on the communities in which it lives; many are apex predators (meaning without a natural predator or enemy). Such species help to maintain local biodiversity within a comm
However, abundance profiles are subject to various interspecies interactions that affect individual organism growth and loss rates2,3. Bacterial communities constitute “social networks” in which the members interact with each other in various ways, including competition for nutrients, cooperation by cross...