Index words: Biomass Cyanobacteria Chlorophytes Cryptophyceae Chrysophyceae Diatoms Phytoplankton abundance, composition, and productivity were monitored on a bi-weekly basis from March/ April throughNovember/December at twooffshore stations in southeastern LakeMichigan in 1983–1987, 1995– 1998 and 2007–2008 (exception 1983–1984 which were sampled from May to August). During the spring isotherm...

1. Numerous plant traits are known to influence aspects of individual performance, including rates of carbon uptake, tissue turnover, mortality and fecundity. These traits are bound to influence emergent properties of vegetation because quantities such as leaf-area cover, average height, primary productivity and density of standing biomass result from the collective behaviour of individuals. Ye...

Plant biomass enhancement using transgenesis in model as well as in crop plants both under optimal and stress controlled (greenhouse or growth chamber) and field conditions is observed. It was documented that genetic engineering approaches allow reaching up to two-fold increase of biomass in optimal conditions. Both transgenic and initial plants reduce biomass production under stress. It was de...

The objective of this study was to investigate the growth rate of Chlorella vulgaris for CO2 biofixation and biomass production. Six mathematical growth models (Logistic, Gompertz, modified Gompertz, Baranyi, Morgan and Richards) were used to evaluate the biomass productivity in continuous processes and to predict the following parameters of cell growth: lag phase duration (λ), maximum specific...

maintaining soil productivity is one of the key factors in sustainable agriculture. soil erosion reduces soil productivity over a long-term period of time. therefore, determining soil erosion tolerance is necessary for sustainable agriculture production. in this study, the long-term effects of erosion on soil productivity in the typical kohin watershed were evaluated. the soil productivity inde...

Rates of grazing on phytoplankton by macrozooplankton (cladocerans and copepods > 220 μm in length) and microzooplankton (animals < 220 μm, mostly rotifers and nauplii) were determined for Lake Champlain on three occasions using a modified version of the Lehman-Sandgren method. Gradients in grazer density were created in fertilized cubitainers incubated in situ, and clearance rates on specific ...

Purpose-grown trees have the potential to be a significant portion of the bioenergy solution in the Southeastern United States. Trees are a biomass source with existing end-use markets and associated infrastructure and provide a “living inventory” with a variety of benefits over annually harvested energy crops. The economic feasibility of utilizing tree woody biomass is improved by increasing p...

Three plant species from each of three grassland ecosystems were grown under elevated (700 mL/m3) and ambient (350 mL/m3) CO2 and were defoliated or left undefoliated to test whether species response to elevated CO2 and grazing is related to evolutionary grazing history or to mode of photosynthesis. The three ecosystems represented a tropical grassland dominated by C4 species (the Serengeti of ...

The precise and rapid estimation of grassland biomass is an important scientific issue in grassland ecosystem research. In this study, based on a field survey of 1205 sites together with biomass data of the Xilingol grassland for the years 2005–2012 and the ―accumulated‖ MODIS productivity starting from the beginning of growing season, we built regression models to estimate the aboveground biom...