A Field & Classroom Exercise for Measuring the Species Diversity of Freshwater Plankton Communities

1994 ◽  
Vol 56 (5) ◽  
pp. 297-301 ◽  
Author(s):  
John M. Kirby ◽  
Larry N. Reinking
Keyword(s):  
Species Diversity ◽  
Classroom Exercise ◽  
Freshwater Plankton ◽  
Plankton Communities

scholarly journals Complex Analyses of Plankton Structure and Function

2001 ◽  
Vol 1 ◽  
pp. 119-132 ◽  
Author(s):  
Karl E. Havens
Keyword(s):  
Size Structure ◽  
Experimental Studies ◽  
Structure And Function ◽  
Size Spectrum ◽  
Phytoplankton Productivity ◽  
Resource Managers ◽  
Carbon Transfer ◽  
And Function ◽  
Freshwater Plankton ◽  
Plankton Communities

This paper critically evaluates some complex methods that have been used to characterize the structure and function of freshwater plankton communities. The focus is on methods related to plankton size structure and carbon transfer. The specific methods reviewed are 1) size spectrum analysis, 2) size-fractionated phytoplankton productivity, 3) size-fractionated zooplankton grazing, 4) plankton ecological transfer efficiency, and 5) grazer effects on phytoplankton community structure. Taken together, these methods can provide information on community ecological properties that are directly related to practical issues including water quality and fisheries productivity. However, caution is warranted since application without a complete understanding of assumptions and context of the manipulations could lead to erroneous conclusions. As an example, experimental studies involving the addition or removal of zooplankton, especially when coupled with nutrient addition treatments, could provide information on the degree of consumer vs. resource control of phytoplankton. Resource managers subsequently could use this information in developing effective measures for controlling nuisance algal biomass. However, the experiments must be done critically and with sufficient safeguards and other measurements to ensure that treatments (e.g., zooplankton exclosure by screening of water) actually are successful and do not introduce other changes in the community (e.g., removal of large algae). In all of the methods described here, the investigator must take care when generalizing results and, in particular, carry out a sufficient number of replications to encompass both the major seasonal and spatial variation that occurs in the ecosystem.

scholarly journals Biomass Distribution in Freshwater Plankton Communities

1995 ◽  
Vol 146 (1) ◽  
pp. 135-152 ◽  
Author(s):  
Paul A. del Giorgio ◽  
Josep M. Gasol
Keyword(s):  
Biomass Distribution ◽  
Freshwater Plankton ◽  
Plankton Communities

scholarly journals Dynamics of biodegradable DOC produced by freshwater plankton communities

2000 ◽  
Vol 23 ◽  
pp. 73-83 ◽  
Author(s):  
M Søndergaard ◽  
NH Borch ◽  
B Riemann
Keyword(s):  
Freshwater Plankton ◽  
Plankton Communities

scholarly journals A resource-based game theoretical approach for the paradox of the plankton

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2329 ◽  
Author(s):  
Weini Huang ◽  
Paulo Roberto de Araujo Campos ◽  
Viviane Moraes de Oliveira ◽  
Fernando Fagundes Ferrreira
Keyword(s):  
Species Diversity ◽  
Competitive Exclusion ◽  
Evolutionary Games ◽  
Payoff Matrix ◽  
Central Focus ◽  
Number Of Species ◽  
High Species Diversity ◽  
Game Theoretical Approach ◽  
Plankton Communities ◽  
Over Time

The maintenance of species diversity is a central focus in ecology. It is not rare to observe more species than the number of limiting resources, especially in plankton communities. However, such high species diversity is hard to achieve in theory under the competitive exclusion principles, known as the plankton paradox. Previous studies often focus on the coexistence of predefined species and ignore the fact that species can evolve. We model multi-resource competitions using evolutionary games, where the number of species fluctuates under extinction and the appearance of new species. The interspecific and intraspecific competitions are captured by a dynamical payoff matrix, which has a size of the number of species. The competition strength (payoff entries) is obtained from comparing the capability of species in consuming resources, which can change over time. This allows for the robust coexistence of a large number of species, providing a possible solution to the plankton paradox.

scholarly journals Struktur Komunitas Plankton Perairan Payau di Kecamatan Wedung Kabupaten Demak

2016 ◽  
Vol 18 (2) ◽  
pp. 89
Author(s):  
Isyarotuz Zakiyyah ◽  
Jafron Wasiq Hidayat ◽  
Fuad Muhammad
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Quality Standards ◽  
Plankton Community ◽  
Natural Food ◽  
Brackish Waters ◽  
Copepod Nauplius ◽  
The Government ◽  
Plankton Communities ◽  
Analyze Data

Aquaculture are highly prioritized by the government to support the economy. Products from the aquaculture sector is also targeted as a source of income to the Indonesian country. Aquaculture needs to improve to manage water quality, especially plankton to support natural food of the fish. This study aims to examines structure of plankton community in the brackish waters of the District Wedung and then examines the water quality with environmental quality standards of water the cultivation. Research was conducted in February-April 2015. The method used to analyze data that plankton with uses keanekargaman index (H ') and the perataan index ( e ). The results showed that the number of species (genera) plankton obtained during research in the waters of the District Wedung was 45 species, these types consist of 37 species of phytoplankton and zooplankton 8 types. The most common plankton species found in all the stations were Fragillaria sp, Synedra ulna, Oscillatoria formosa and Copepod nauplius. Index of species diversity that existed at the District Wedung moderate to high waters with a range from 1.69 to 2.91 therefore a complex community and stability of the ecosystem were moderate to high. The evennes index ranged from 0.63 to 0.85. Water quality based on the pH, salinity, Turbidity, N, P and organic materials are less good for the cultivation so that the necessary processing on the pond so that according to the criteria of the quality standards of water quality. Keywords: structure of plankton communities, brackish waters, District Wedung

Oxidation of Thallium by Freshwater Plankton Communities

2003 ◽  
Vol 37 (12) ◽  
pp. 2720-2726 ◽  
Author(s):  
Benjamin S. Twining ◽  
Michael R. Twiss ◽  
Nicholas S. Fisher
Keyword(s):  
Freshwater Plankton ◽  
Plankton Communities

scholarly journals Effects of chloride and nutrients on freshwater plankton communities

2021 ◽  
Author(s):  
Danielle A. Greco ◽  
Shelley E. Arnott ◽  
Isabelle B. Fournier ◽  
Brandon S. Schamp
Keyword(s):  
Freshwater Plankton ◽  
Plankton Communities
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