Geographic distribution and ecological niche of plague in sub-Saharan Africa. (1/68)
(+info)Morphological and microsatellite diversity associated with ecological factors in natural populations of Medicago laciniata Mill. (Fabaceae). (2/68)
Genetic variability in 10 natural Tunisian populations of Medicago laciniata were analysed using 19 quantitative traits and 12 polymorphic microsatellite loci. A large degree of genetic variability within-populations and among-populations was detected for both quantitative characters and molecular markers. High genetic differentiation among populations for quantitative traits was seen, with Q(ST) = 0.47, and F(ST) = 0.47 for microsatellite markers. Several quantitative traits displayed no statistical difference in the levels of Q(ST) and F(ST). Further, significant correlations between quantitative traits and eco-geographical factors suggest that divergence in the traits among populations may track environmental differences. There was no significant correlation between genetic variability at quantitative traits and microsatellite markers within populations. The site-of-origin of eco-geographical factors explain between 18.13% and 23.40% of genetic variance among populations at quantitative traits and microsatellite markers, respectively. The environmental factors that most influence variation in measured traits among populations are assimilated phosphorus (P(2)0(5)) and mean annual rainfall, followed by climate and soil texture, altitude and organic matter. Significant associations between eco-geographical factors and gene diversity, He, were established in five microsatellite loci suggesting that these simple sequence repeats (SSRs) are not necessarily biologically neutral. (+info)The impact of human-made ecological changes on the genetic architecture of Daphnia species. (3/68)
(+info)An integrative framework for stochastic, size-structured community assembly. (4/68)
(+info)Expanding ecological and evolutionary insights from wild Arabidopsis thaliana accessions. (5/68)
(+info)A high-throughput DNA sequence aligner for microbial ecology studies. (6/68)
(+info)The secret life of oilbirds: new insights into the movement ecology of a unique avian frugivore. (7/68)
(+info)The cladistic basis for the phylogenetic diversity (PD) measure links evolutionary features to environmental gradients and supports broad applications of microbial ecology's "phylogenetic beta diversity" framework. (8/68)
(+info)Ecological and environmental phenomena refer to the processes, conditions, and interactions between living organisms and their physical surroundings in a given ecosystem or environment. These phenomena can include various natural and human-induced factors that affect the health, distribution, abundance, and diversity of species and populations within an ecosystem, as well as the overall function and stability of the ecosystem itself.
Examples of ecological and environmental phenomena include:
1. Biogeochemical cycles (e.g., carbon, nitrogen, phosphorus) that regulate the flow of nutrients and energy through an ecosystem.
2. Climate change and global warming, which can alter temperature, precipitation patterns, and other abiotic factors that impact species' distributions and survival.
3. Habitat fragmentation and loss due to human activities such as land use changes, urbanization, and deforestation, which can lead to declines in biodiversity and ecosystem health.
4. Pollution from various sources (e.g., air, water, soil) that can harm living organisms and disrupt ecological processes.
5. Invasive species introductions, which can outcompete native species for resources and alter community structure and function.
6. Natural disasters such as wildfires, hurricanes, and floods that can impact ecosystems and their inhabitants in various ways.
7. Human-induced disturbances such as hunting, fishing, and logging that can affect population dynamics and community structure.
Understanding ecological and environmental phenomena is crucial for developing effective strategies to conserve biodiversity, mitigate climate change, and promote sustainable development.