Simultaneous measurements of biomass and excretion of macroplankton-micronekton lead to similar results in tropical Atlantic and Pacific Oceans. Ratios are thus proposed to roughly estimate regenerated production in oligotrophic tropical waters from biomass data: biomass figures (mg dry wt m-') should be multiplied by 0.32 to estimate the amount of total nitrogen excreted (p,g at m-' day-') and...

chromium is one of the major causes of environmental pollution. to remove heavy metal ions from water, microorganisms can be used. in this study, dead fungal biomass of aspergillus niger is used. the biomass was boiled in 0.5 n naoh solutions to increase the metal removal capacity of a.niger and was applied when the ph of wash solution was in the normal range. the optimum adsorption ph value ob...

geostatistical techniques were used to describe the spatial distribution of weeds, under conventional management conditions and theirs effect on wheat biomass production over the course of one growing season (2008-2009), in a wheat (triticum aestivum l.) field at research station of shahrood university, iran. weeds seedling were identified and counted at 121 points of field based on two interva...

Variation in individual density may explain the unimodal richness-biomass relationship in which species richness peaks at an intermediate level of total biomass. However, it is unclear how individual density is regulated by community thinning (i.e., mortality due to competition with neighbors) as total above-ground biomass increases. We developed a simulation model which demonstrates that the s...

Understanding forest carbon budget and dynamics for sustainable resource management and ecosystem functions requires quantification of above- and below-ground biomass at individual tree species and stand levels. In this study, a total of 122 trees (9-12 per species) were destructively sampled to determine above- and below-ground biomass of 12 tree species (Acer mandshuricum, Acer mono, Betula p...

However, "global photosynthesis" has the same features that characterize a normal photosynthesis. It consists of two reciprocal processes of CO2 assimilation and photorespiration. The strengthening of one of them is accompanied by the weakening of the other. The effect of each of the processes on the total biomass growth is opposite and depends on the concentration ratio of the CO2 and O2 in th...

Two SAR and biomass data sets of forests with different canopy architectures were examined for commonalties regarding backscatterhiomass saturation. The SAR data were collected using the NASNJPL AIRSAR at incidence angles between 40’ and 50’ for tropical broadleaf evergreen forests in Hawaii and coniferous forests in North America and Europe. Radar signal saturation L i t s with respect to biom...

The stability of phytoplankton biomass is important in maintaining the health of an aquatic ecosystem. In this study, the main environmental factors and phytoplankton biomass were investigated monthly from May 2011 to April 2013 in a eutrophic lake. The influence of both the mean values and variability (standard deviation) of environmental factors on the temporal stability index (TSI, measured ...

At a shallow (7 m) near-shore sampling site in the Black Sea we analyzed composition, abundance, and biomass of benthopelagic organisms and the contribution these animals make to the total plankton. The site was monitored across several years (1996-2001; 2006-2007) whilst for 1999-2000 the seasonal variations were analysed. A total of 321 samples from Golubaja Bay near Novorossiysk (44°34'31.04...