نتایج جستجو برای: biomass productivity index

تعداد نتایج: 532745  

2010
Dawn M. Browning Debra C. Peters Caiti Steele Albert Rango

Spatial measures of terrestrial biomass that are accurate and repeatable are important to monitoring landscape condition and modeling productivity in the world’s grassland and savanna (i.e., rangeland) ecosystems. Remote sensing offers potential to characterize seasonal changes in biomass in a consistent and non-destructive manner. A high degree of structural and spatial heterogeneity [1] and i...

2015
Ivor D. Williams Julia K. Baum Adel Heenan Katharine M. Hanson Marc O. Nadon Russell E. Brainard

Coral reefs around US- and US-affiliated Pacific islands and atolls span wide oceanographic gradients and levels of human impact. Here we examine the relative influence of these factors on coral reef fish biomass, using data from a consistent large-scale ecosystem monitoring program conducted by scientific divers over the course of >2,000 hours of underwater observation at 1,934 sites, across ~...

2000
Joong Kyun Kim Bum-Kyu Lee

Three different types of anaerobic fermentations were used for the mass production of the photosynthetic bacterium Rhodopseudomonas palustris as diet for aquaculture. The optimum agitation speed and malate concentration were 300 r.p.m. and 0.2% in the modified MYC medium, respectively. In batch fermentations of R. palustris, the maximum number of viable cells was 1.1×10 c.f.u. ml with 2.65 g l ...

2014
Izabela Krzemińska Barbara Pawlik-Skowrońska Magdalena Trzcińska Jerzy Tys

The effect of different photoperiods: 24 h illumination and a 12:12-h light/dark (12L:12D) cycle on the growth rate and biomass productivity was studied in five algal species: Neochloris conjuncta, Neochloris terrestris, Neochloris texensis, Botryococcus braunii and Scenedesmus obliquus. The green microalgae examined differ in the reproduction mode. Continuous illumination stimulated the growth...

2003
David H. Peterson John F. Festa F. Festa

A two-dimensional steady-state model of light-driven phytoplankton productivity and biomass in partially mixed estuaries has been developed. Effects of variations in river flow, suspended sediment concentration, phytoplankton sinking, self-shading and growth rates on distributions of phytoplankton biomass and productivity are investigated. Numerical simulation experiments show that biomass and ...

Journal: :Journal of biotechnology 2014
C A Santos B Nobre T Lopes da Silva H M Pinheiro A Reis

Chlorella protothecoides, a lipid-producing microalga, was grown heterotrophically and autotrophically in separate reactors, the off-gases exiting the former being used to aerate the latter. Autotrophic biomass productivity with the two-reactor association, 0.0249gL(-1)h(-1), was 2.2-fold the value obtained in a control autotrophic culture, aerated with ambient air. Fatty acid productivity was ...

Sesame is an important oilseed crop in India. To determine potential traits and selection criteria for yield improvement, ninety sesame (Sesamum indicum L.) genotypes were studied in a randomized complete block design with three replications. The data collected on 13 characters were subjected to three different analyses. In variability analysis, high heritability was accompanied by a high genet...

2016
Kenneth Wei Min Tan Yuan Kun Lee

Rising oil prices and concerns over climate change have resulted in more emphasis on research into renewable biofuels from microalgae. Unlike plants, green microalgae have higher biomass productivity, will not compete with food and agriculture, and do not require fertile land for cultivation. However, microalgae biofuels currently suffer from high capital and operating costs due to low yields a...

2016
Bradley Cardinale Ann Arbor Kevin Gross Keith Fritschie Pedro Flombaum Jeremy W. Fox Christian Rixen Jasper van Ruijven Peter B. Reich Michael Scherer-Lorenzen Brian J. Wilsey BRADLEY J. CARDINALE KEVIN GROSS KEITH FRITSCHIE PEDRO FLOMBAUM JEREMY W. FOX CHRISTIAN RIXEN PETER B. REICH MICHAEL SCHERER-LORENZEN BRIAN J. WILSEY

To predict the ecological consequences of biodiversity loss, researchers have spent much time and effort quantifying how biological variation affects the magnitude and stability of ecological processes that underlie the functioning of ecosystems. Here we add to this work by looking at how biodiversity jointly impacts two aspects of ecosystem functioning at once: (1) the production of biomass at...

Journal: :Ecology 2013
Bradley J Cardinale Kevin Gross Keith Fritschie Pedro Flombaum Jeremy W Fox Christian Rixen Jasper van Ruijven Peter B Reich Michael Scherer-Lorenzen Brian J Wilsey

To predict the ecological consequences of biodiversity loss, researchers have spent much time and effort quantifying how biological variation affects the magnitude and stability of ecological processes that underlie the functioning of ecosystems. Here we add to this work by looking at how biodiversity jointly impacts two aspects of ecosystem functioning at once: (1) the production of biomass at...

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