Results 11 to 20 of about 5,546,226 (282)

The Fight to Capture Light: Functional Diversity Is Related to Aquatic Plant Community Productivity Likely by Enhancing Light Capture

open access: yesFrontiers in Marine Science, 2020
Functional diversity (FD) experiments are highly effective for investigating how a community interacts with its environment. However, such experiments using morphological and chemical traits have not been conducted for submerged aquatic plants and their ...
Charlotte Angove   +3 more
doaj   +1 more source

Toward an overall analytical framework for the integrated sustainability assessment of the production and supply of raw materials and primary energy carriers [PDF]

open access: yes, 2015
The sustainable production and supply of raw materials (nonenergy raw materials) and primary energy carriers (energy raw materials) is a core element of many policies. The natural resource base for their production and supply, and the access thereto, are
Blengini, Gian Andrea   +5 more
core   +2 more sources

Parasite and pathogen effects on ecosystem processes: A quantitative review

open access: yesEcosphere, 2020
Pathogens and parasites (henceforth “pathogens”) can make up a large percentage of the biomass found in ecosystems, and therefore, their impacts on ecosystem processes should be prominent.
Ilya R. Fischhoff   +7 more
doaj   +1 more source

Estimation of algal growth parameters from vertical primary production profiles [PDF]

open access: yes, 1981
Phytoplankton maximum growth rate and the saturation light intensity, Is, can be estimated from vertical profiles of primary production by non-linear least-squares estimation.
Herodek, Sandor, Straten, Gerrit van
core   +2 more sources

Observational insights into chlorophyll distributions of subtropical South Indian Ocean eddies

open access: yesGeophysical Research Letters, 2017
The South Indian Ocean subtropical gyre has been described as a unique environment where anticyclonic ocean eddies highlight enhanced surface chlorophyll in winter.
François Dufois   +8 more
doaj   +1 more source

Aquatic herbaceous plants of the Amazon floodplains: state of the art and research needed Herbáceas aquáticas das áreas alagáveis amazônicas: estado da arte e estudos necessários

open access: yesActa Limnologica Brasiliensia, 2010
The Amazonian wetlands cover a vast area subject to a monomodal flood pulse with an annual amplitude averaging 10 m, which defines an aquatic phase and a terrestrial phase of great biological importance.
Maria Teresa Fernandez Piedade   +6 more
doaj   +1 more source

The excretion of nitrogen and phosphorus and changes in nitrogen content in the Antarctic amphipod Waldeckia obesa and isopod Glyptonotus antarcticus during long-term starvation

open access: yesThe European Zoological Journal, 2022
Seasonal food availability for benthic feeders in Antarctica can influence the level of excreted metabolites, which may then be a source of N and P for autotrophs.
A. Nędzarek, K. Stepanowska
doaj   +1 more source

Interannual Variation in Phytoplankton Primary Production at A Global Scale

open access: yesRemote Sensing, 2013
We used the NASA Ocean Biogeochemical Model (NOBM) combined with remote sensing data via assimilation to evaluate the contribution of four phytoplankton groups to the total primary production.
Cecile S. Rousseaux, Watson W. Gregg
doaj   +1 more source

High Net Primary Production of Mediterranean Seagrass (Posidonia oceanica) Meadows Determined With Aquatic Eddy Covariance

open access: yesFrontiers in Marine Science, 2020
We report primary production and respiration of Posidonia oceanica meadows determined with the non-invasive aquatic eddy covariance technique. Oxygen fluxes were measured in late spring at an open-water meadow (300 m from shore), at a nearshore meadow ...
Dirk Koopmans   +5 more
doaj   +1 more source

Aztec obsidian industries [PDF]

open access: yes, 2016
Obsidian was the primary lithic or stone material used for cutting activities in Aztec society, including domestic food production, craft production, hunting, warfare, and ritual.
Carballo, David M., Pastrana, Alejandro
core   +1 more source

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