نتایج جستجو برای: phytoplankton composition

تعداد نتایج: 270457  

2012
Johanna Fehling Keith Davidson Christopher J. S. Bolch Tim D. Brand Bhavani E. Narayanaswamy

Phytoplankton underpin the marine food web in shelf seas, with some species having properties that are harmful to human health and coastal aquaculture. Pressures such as climate change and anthropogenic nutrient input are hypothesized to influence phytoplankton community composition and distribution. Yet the primary environmental drivers in shelf seas are poorly understood. To begin to address ...

2017
Wenxi Zhao Yanying Li Yongjie Jiao Bin Zhou Rolf D. Vogt Honglei Liu Min Ji Zhe Ma Anding Li Beihai Zhou Yaping Xu

This study assesses spatial and temporal variation in environmental variables in relation to phytoplankton community size and composition in a typically eutrophic river reservoir (Hai River, northern China). The aim is to identify environmental parameters governing spatial and temporal differences in phytoplankton density and composition. Physicochemical parameters, including nutrient concentra...

2014
Jamie W. Becker Paul M. Berube Christopher L. Follett John B. Waterbury Sallie W. Chisholm Edward F. DeLong Daniel J. Repeta

Production of dissolved organic matter (DOM) by marine phytoplankton supplies the majority of organic substrate consumed by heterotrophic bacterioplankton in the sea. This production and subsequent consumption converts a vast quantity of carbon, nitrogen, and phosphorus between organic and inorganic forms, directly impacting global cycles of these biologically important elements. Details regard...

2015
Esteban Acevedo-Trejos Gunnar Brandt Jorn Bruggeman Agostino Merico

The factors regulating phytoplankton community composition play a crucial role in structuring aquatic food webs. However, consensus is still lacking about the mechanisms underlying the observed biogeographical differences in cell size composition of phytoplankton communities. Here we use a trait-based model to disentangle these mechanisms in two contrasting regions of the Atlantic Ocean. In our...

2012
Tiffany A.H. Moisan Shubha Sathyendranath Heather A. Bouman

Interest in phytoplankton diversity has increased in recent years due to its possible role in regulating climate by production and consumption of greenhouse gases. For example, gases can diffuse across the air-sea interface, many of which are synthesized and emitted by certain phytoplankton species or groups. It has been suggested that these variations play an important role in moderating our c...

A. Ganjian, A. Roohi , H. Fazli, K. Yahya, M. Vahedi, S. M. V. Farabi , W. O. Wan Maznah,

 Seasonal distribution of species composition, cell abundance and biomass of phytoplankton of the Caspian Sea were investigated in 2005. This survey were fulfilled in 6 transects and 26 stations A total of 260 samples were collected during winter to autumn in the southern part of Caspian Sea. Totally, 163 species of phytoplankton were identified (71 species Bacillariophyta, 31 species Chlorophy...

A. Ganjian, A. Roohi H. Fazli K. Yahya M. Vahedi S. M. V. Farabi W. O. Wan Maznah

 Seasonal distribution of species composition, cell abundance and biomass of phytoplankton of the Caspian Sea were investigated in 2005. This survey were fulfilled in 6 transects and 26 stations A total of 260 samples were collected during winter to autumn in the southern part of Caspian Sea. Totally, 163 species of phytoplankton were identified (71 species Bacillariophyta, 31 species Chlorophy...

2015
C. J. Daniels A. J. Poulton M. Esposito M. L. Paulsen R. Bellerby M. St John A. P. Martin

The spring bloom is a key annual event in the phenology of pelagic ecosystems, making a major contribution to the oceanic biological carbon pump through the production and export of organic carbon. However, there is little consensus as to the main drivers of spring bloom formation, exacerbated by a lack of in situ observations of the phytoplankton community composition and its evolution during ...

2009

To improve our mechanistic understanding and predictive capacities with respect to climate change effects on the spring phytoplankton bloom in temperate marine systems, we used a process-driven dynamical model to disentangle the impact of potentially relevant factors which are often correlated in the field. The model was based on comprehensive indoor mesocosm experiments run at four temperature...

2010
Valeria A. Guinder Cecilia A. Popovich Juan Carlos Molinero Gerardo M. E. Perillo

The phytoplankton of the Bahı́a Blanca Estuary, Argentina, has been surveyed since 1978. Chlorophyll a, phytoplankton abundance, species composition and physico-chemical variables have been fortnightly recorded. From 1978 to 2002, a single winter–early spring diatom bloom has dominated the main pattern of phytoplankton interannual variability. Such pattern showed noticeable changes since 2006: t...

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