نتایج جستجو برای: polyculture

تعداد نتایج: 411  

2014
Martin Axelsson Francesco Gentili

Microalgae produce a wide range of lipid compounds of potential commercial interest. Total lipid extraction performed by conventional extraction methods, relying on the chloroform-methanol solvent system are too laborious and time consuming for screening large numbers of samples. In this study, three previous extraction methods devised by Folch et al. (1957), Bligh and Dyer (1959) and Selstam a...

Journal: :The American naturalist 2014
Kevin Gross Bradley J Cardinale Jeremy W Fox Andrew Gonzalez Michel Loreau H Wayne Polley Peter B Reich Jasper van Ruijven

The relationship between biological diversity and ecological stability has fascinated ecologists for decades. Determining the generality of this relationship, and discovering the mechanisms that underlie it, are vitally important for ecosystem management. Here, we investigate how species richness affects the temporal stability of biomass production by reanalyzing 27 recent biodiversity experime...

Journal: :The New phytologist 2011
Anita Antoninka Peter B Reich Nancy Collins Johnson

• We tested the prediction that the abundance and diversity of arbuscular mycorrhizal (AM) fungi are influenced by resource availability and plant community composition by examining the joint effects of carbon dioxide (CO(2) ) enrichment, nitrogen (N) fertilization and plant diversity on AM fungi. • We quantified AM fungal spores and extramatrical hyphae in 176 plots after 7 yr of treatment wit...

2010
A. Randall Hughes Rebecca J. Best John J. Stachowicz

Despite experimental evidence for effects of primary producer diversity and consumer species diversity on population and community processes, little is known about how diversity at these multiple trophic levels may interact. We conducted a mesocosm experiment to examine the independent and interactive effects of seagrass Zostera marina genotypic diversity and grazer species diversity on seagras...

2001
Jeffrey S. Dukes

Several researchers have hypothesized that, through various mechanisms, loss of species and functional group richness from a plant community will affect the magnitude and interannual variability of productivity. To test this hypothesis, I conducted a microcosm study of California grassland communities that differed in species richness. I grew cohorts of microcosms that simulated undisturbed gra...

Journal: :IOP conference series 2022

Abstract Tetragonula laeviceps is the most widely distributed stingless bee species in tropics. The observation on foraging activity of workers had been done from September to December 2020 at a polyculture cropland Batusangkar, Tanah Datar Regency, West Sumatra. study aimed determine pattern this with vegetation mixture and identify relationships between environmental factors i.e., temperature...

The highly valued sea cucumber Holothuria scabra is currently listed as endangered (EN) species in the IUCN Red List due to overfishing in most of its native locations, spurring the development of H. scabra aquaculture to ensure sustainability of the industry and species in the wild. This review presents a summary on the biology of Holothuria scabra and recent advancements of its aquaculture te...

نمودار تعداد نتایج جستجو در هر سال

با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید