نتایج جستجو برای: forty plots were established
تعداد نتایج: 3689276 فیلتر نتایج به سال:
Habitat management and enhancement are proven ways to encourage native bee populations by providing them with food and nesting resources. I examined the bee diversity and abundance in twenty-four plots managed by The Nature Conservancy near Wood River, NE. The plots were seeded with two seed mixes at two seeding rates. I tested the null hypothesis that the seeding treatments would not affect th...
Research was conducted on silt-loam Alfisols at the Pine Tree Branch (PTBS) and Cotton Branch (CBES) Experiment Stations. Prior to the initiation of this study, both study locations were cropped under CT; thus the results of this study represent a short-term NT history. Previous crops were sorghum (Sorghum bicolor L.) and soybean at PTBS and CBES, respectively. The research area was established...
The objective of this study was to determine the bird species in the Yuvacik Dam watershed in the province of Kocaeli. The total area of the study site was 25800 ha, and was subdivided to 60 plots (the size of each plot, 2x2 km). Observations and inventory for each species were carried out. A total of 130 species belonging to 38 genus of 16 orders were identified. Eighty-seven were classified a...
It has been suggested that tropical defaunation may unleash community-wide cascading effects, leading to reductions in plant diversity. However, experimental evidence establishing cause-effect relationships thereof is poor. Through a 5 year exclosure experiment, we tested the hypothesis that mammalian defaunation affects tree seedling/sapling community dynamics leading to reductions in understo...
Photosynthate production is reduced by foliage loss. Thus, scorch-induced decreases in the leaf area of longleaf pine (Pinus pa/u&is Mill.) may reduce photosynthate allocation to roots. In this investigation the root carbohydrate concentrations and dynamics of longleaf pine after two intensities of prescribed burning were monitored. In September 1996,65-year-old longleaf pine were burned. Plots...
Experiments were established in field microplots to examine the association between Heterodera glycines and the blue form of Fusarium solani in sudden death syndrome of soybean (SDS). Foliar disease symptoms occurred on more plants per plot, appeared 3 to 7 days earlier, and were more severe on plants grown in plots infested with F. solani + H. glycines than on those inoculated with F. solani o...
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A field experiment was established in Bocas Del Tom, Panama to examine the relationship between sessile organisms living on mangrove prop roots and fish communities. Artificial mangrove roots (AMR) with different sets of artificial (AE) or real epibionts were established in five different locations in two separate years. Fish species in each plot were identified, counted, and their size estimat...
In this study, host plant - lichen specificity was investigated. Data collected from 1000m2 sampling plots at each of four locations with an established 50m x 20m plot site. Forty-one trees across five species were examined using (10cm by 50cm) ladder quadrats on tree trunks (N, S, E, W) 150cm height. A total 14978 individual lichens identified that yielded 10 families, 13 genera and 18 species...
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