نتایج جستجو برای: transects
تعداد نتایج: 2740 فیلتر نتایج به سال:
Scientific, industrial and societal needs call urgently for the development establishment of intelligent, cost-effective ecologically sustainable monitoring protocols robotic platforms continuous exploration marine ecosystems. Internet Operated Vehicles (IOVs) such as crawlers, provide a versatile alternative to conventional observing sampling tools, being tele-operated, (semi-) permanent mobil...
Nuclear simple sequence repeats (nSSRs), together with 16 different enzyme loci, were used to analyzegenetic diversity and differentiation among beech (Fagus orientalis Lipsky) populations along two altitudinalgradients in Hyrcanian forests of Iran. Both enzymes and nSSR analyses revealed a high level ofgenetic diversity in natural populations of F. orientalis. The genetic div...
Here I present a dataset of edaphic and light conditions associated with the occurrence of sympatric morphotypes of Geonomamacrostachys (Arecaceae/Palmae), a candidate case study from Amazonia hypothesized to have evolved under ecological speciation. Transects were established in three lowland rainforests in Peru, and the abundance of each local morphotype of this species was recorded in a tota...
Rapid survey methods are needed that accurately detect both species richness and relative abundance for surveying new sites and/or for long-term monitoring. We investigate whether the large-scale gradsect survey method of Gillison can be adapted for a smaller scale more suitable for monitoring or research. Three different designs that are compared are typical random small plot sampling and two ...
Atmospheric sampling of organochlorine pesticides (OCPs) was conducted using Semi Permeable Membrane Devices (SPMDs) deployed in the Alps at different altitudinal transects for two consecutive exposure periods of half a year and a third simultaneous year-long period. Along all the altitude profiles, the sequestered amounts of OCPs increased in general with altitude. SPMDs were still working as ...
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