Metabolic dependence of phytoplankton species richness

2015 ◽  
Vol 24 (4) ◽  
pp. 472-482 ◽  
Author(s):  
A. M. Segura ◽  
D. Calliari ◽  
C. Kruk ◽  
H. Fort ◽  
I. Izaguirre ◽  
...  
Keyword(s):  
Species Richness ◽  
Phytoplankton Species ◽  
Metabolic Dependence

scholarly journals Global pattern of phytoplankton diversity driven by temperature and environmental variability

2019 ◽  
Vol 5 (5) ◽  
pp. eaau6253 ◽  
Author(s):  
Damiano Righetti ◽  
Meike Vogt ◽  
Nicolas Gruber ◽  
Achilleas Psomas ◽  
Niklaus E. Zimmermann
Keyword(s):  
Species Richness ◽  
Environmental Variability ◽  
Species Turnover ◽  
Marine Phytoplankton ◽  
Marine Biodiversity ◽  
Phytoplankton Species ◽  
Global Pattern ◽  
Phytoplankton Diversity ◽  
Biogeographic Patterns ◽  
Theoretical Predictions

Despite their importance to ocean productivity, global patterns of marine phytoplankton diversity remain poorly characterized. Although temperature is considered a key driver of general marine biodiversity, its specific role in phytoplankton diversity has remained unclear. We determined monthly phytoplankton species richness by using niche modeling and >540,000 global phytoplankton observations to predict biogeographic patterns of 536 phytoplankton species. Consistent with metabolic theory, phytoplankton richness in the tropics is about three times that in higher latitudes, with temperature being the most important driver. However, below 19°C, richness is lower than expected, with ~8°– 14°C waters (~35° to 60° latitude) showing the greatest divergence from theoretical predictions. Regions of reduced richness are characterized by maximal species turnover and environmental variability, suggesting that the latter reduces species richness directly, or through enhancing competitive exclusion. The nonmonotonic relationship between phytoplankton richness and temperature suggests unanticipated complexity in responses of marine biodiversity to ocean warming.

scholarly journals Zooplankton grazing and phytoplankton species richness: Field tests of the predation hypothesis1

1979 ◽  
Vol 24 (2) ◽  
pp. 243-252 ◽  
Author(s):  
Edward McCauley ◽  
Frédéric Briand
Keyword(s):  
Species Richness ◽  
Field Tests ◽  
Zooplankton Grazing ◽  
Phytoplankton Species

scholarly journals Phytoplankton species richness, evenness, and production in relation to nutrient availability and imbalance

2017 ◽  
Vol 62 (4) ◽  
pp. 1393-1408 ◽  
Author(s):  
Sirpa Lehtinen ◽  
Timo Tamminen ◽  
Robert Ptacnik ◽  
Tom Andersen
Keyword(s):  
Species Richness ◽  
Nutrient Availability ◽  
Phytoplankton Species

scholarly journals Conventional sampling methods severely underestimate phytoplankton species richness

2013 ◽  
Vol 36 (2) ◽  
pp. 334-343 ◽  
Author(s):  
Tamara Rodríguez-Ramos ◽  
María Dornelas ◽  
Emilio Marañón ◽  
Pedro Cermeño
Keyword(s):  
Species Richness ◽  
Sampling Methods ◽  
Phytoplankton Species

scholarly journals Phycological and bacteriological assessment of drinking water in schools of Tanta city, Egypt

2021 ◽  
Author(s):  
Mostafa M. El-Sheekh ◽  
Mai M. Hamoud
Keyword(s):  
Species Richness ◽  
Tap Water ◽  
Algal Species ◽  
Pollution Index ◽  
Treatment Method ◽  
Coliform Bacteria ◽  
Water Type ◽  
Phytoplankton Species ◽  
Water Characteristics ◽  
City Schools

Abstract Frequent water analysis is required to discover pollutants, describe water characteristics, and create a database for the water type that must be cleansed and treated in order to generate healthy water and, as a result, determine the best treatment method. In this regard, the goal of this research is to evaluate the overall physicochemical, phycological, and bacteriological properties of tap water samples taken periodically from twelve different Tanta city schools. A total of fifty-seven algal species were identified throughout the investigation, 33 species belonging to Chlorophyta, 13 species to Bacillariophyta, and 11 species to Cyanophyta. Phytoplankton species richness and diversity were relatively stable in each school all year round. Chlorella, Cyclotella, Scenedesmus, which are organically pollution tolerant genera according to Palmer's pollution index, were observed in the present study. Throughout the research seasons, total and faecal coliform bacteria were positively correlated (r = 0.94) in all of the study area sites. The counts of pollution indicators were more in groundwater than treated water.

scholarly journals Emergent neutrality drives phytoplankton species coexistence

2011 ◽  
Vol 278 (1716) ◽  
pp. 2355-2361 ◽  
Author(s):  
Angel M. Segura ◽  
Danilo Calliari ◽  
Carla Kruk ◽  
Daniel Conde ◽  
Sylvia Bonilla ◽  
...  
Keyword(s):  
Species Richness ◽  
Community Dynamics ◽  
Phytoplankton Community ◽  
Species Coexistence ◽  
Size Structure ◽  
Mechanistic Explanation ◽  
Species Competition ◽  
Phytoplankton Species ◽  
Community Patterns ◽  
Plausible Mechanism

The mechanisms that drive species coexistence and community dynamics have long puzzled ecologists. Here, we explain species coexistence, size structure and diversity patterns in a phytoplankton community using a combination of four fundamental factors: organism traits, size-based constraints, hydrology and species competition. Using a ‘microscopic’ Lotka–Volterra competition (MLVC) model (i.e. with explicit recipes to compute its parameters), we provide a mechanistic explanation of species coexistence along a niche axis (i.e. organismic volume). We based our model on empirically measured quantities, minimal ecological assumptions and stochastic processes. In nature, we found aggregated patterns of species biovolume (i.e. clumps) along the volume axis and a peak in species richness. Both patterns were reproduced by the MLVC model. Observed clumps corresponded to niche zones (volumes) where species fitness was highest, or where fitness was equal among competing species. The latter implies the action of equalizing processes, which would suggest emergent neutrality as a plausible mechanism to explain community patterns.

scholarly journals Phytoplankton species richness scales consistently from laboratory microcosms to the world's oceans

2005 ◽  
Vol 102 (12) ◽  
pp. 4393-4396 ◽  
Author(s):  
V. H. Smith ◽  
B. L. Foster ◽  
J. P. Grover ◽  
R. D. Holt ◽  
M. A. Leibold ◽  
...  
Keyword(s):  
Species Richness ◽  
Phytoplankton Species
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