نتایج جستجو برای: arthropods
تعداد نتایج: 7453 فیلتر نتایج به سال:
Absract The diversity and community structure of arthropods in the primitive tobacco ecosystem in the South of Anhui province, China was studied. The investigations were undertaken from April to August 2012. The comparisons were undertaken using a combination of community assessment approaches, including morphospecies richness, the Shannon-Weaver diversity index, H', the Simpson dominance index...
Savannahs are structurally complex ecosystems consisting of a diverse community plants and animals such as arthropods. Arthropods essential in many ecosystem processes that help maintain life on Earth. The anthropogenic conversion natural landscapes into croplands, residential industrial areas has negative impact surface-active arthropods have limited dispersal abilities narrow habitat preferen...
The creeping of the beetle Tetraopes tetraopthalmus during negatively geotropic orientation shows the angles of orientation (theta) on a surface inclined at alpha degrees to the horizontal to be proportional to sin alpha. The direction of orientation easily suffers temporary reversal to positive as result of handling. Mechanical stability during upward progression should be just possible when K...
There are 10 major arthropod pest species affecting dairy cattle including six fly and four louse species. Damage inflicted by arthropods falls into two categories: direct damage and indirect damage. Direct damage includes blood loss, introduction of salivary secretions, tissue damage, reduced value of saleable animal products, and annoyance. Indirect damage includes transferring pathogenic org...
Quantifying the spatio-temporal distribution of arthropods in tropical rainforests represents a first step towards scrutinizing the global distribution of biodiversity on Earth. To date most studies have focused on narrow taxonomic groups or lack a design that allows partitioning of the components of diversity. Here, we consider an exceptionally large dataset (113,952 individuals representing 5...
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