Organisms interact with each other in very different ways. These interactions include, among many others, those established between prey and predators, hosts and parasites, and plant roots and beneficial mycorrhizal fungi. Plants also interact among them, competing for resources (e.g., water, light or nutrients) or creating a favorable environment (e.g., shade) that facilitates the establishment and survival of seedlings from other species. Although classic ecological studies have profoundly...

Conservation plans can be greatly improved when information on the evolutionary and demographic consequences of habitat fragmentation is available for several codistributed species. Here it has been studied the spatial patterns of phenotypic and genetic variation among five grasshopper species that are codistributed across a network of microreserves but show remarkable differences in dispersal-related morphology, degree of habitat specialization and extent of fragmentation of their respective...