scholarly journals Effect of nutrient availability on carbon and nitrogen incorporation and flows through benthic algae and bacteria in near-shore sandy sediment

2007 ◽  
Vol 49 ◽  
pp. 165-180 ◽  
Author(s):  
PLM Cook ◽  
B Veuger ◽  
S Böer ◽  
JJ Middelburg
Keyword(s):  
Nutrient Availability ◽  
Benthic Algae ◽  
Sandy Sediment ◽  
Carbon And Nitrogen ◽  
Nitrogen Incorporation ◽  
Near Shore ◽  
Algae And Bacteria

Phototoxicity of Pyrene Affects Benthic Algae and Bacteria from the Arctic

2008 ◽  
Vol 42 (4) ◽  
pp. 1371-1376 ◽  
Author(s):  
Dorthe G. Petersen ◽  
Fredrik Reichenberg ◽  
Ingela Dahllöf
Keyword(s):  
Benthic Algae ◽  
The Arctic ◽  
Algae And Bacteria

scholarly journals Macrofauna regulate heterotrophic bacterial carbon and nitrogen incorporation in low-oxygen sediments

2012 ◽  
Vol 6 (11) ◽  
pp. 2140-2151 ◽  
Author(s):  
William R Hunter ◽  
Bart Veuger ◽  
Ursula Witte
Keyword(s):  
Low Oxygen ◽  
Carbon And Nitrogen ◽  
Nitrogen Incorporation

scholarly journals Nutrient availability controls the impact of mammalian herbivores on soil carbon and nitrogen pools in grasslands

2020 ◽  
Vol 26 (4) ◽  
pp. 2060-2071 ◽  
Author(s):  
Judith Sitters ◽  
E. R. Jasper Wubs ◽  
Elisabeth S. Bakker ◽  
Thomas W. Crowther ◽  
Peter B. Adler ◽  
...  
Keyword(s):  
Soil Carbon ◽  
Nutrient Availability ◽  
Carbon And Nitrogen ◽  
Mammalian Herbivores ◽  
Soil Carbon And Nitrogen ◽  
Nitrogen Pools ◽  
The Impact

scholarly journals Carbon and nitrogen flows through the benthic food web of a photic subtidal sandy sediment

2010 ◽  
Vol 416 ◽  
pp. 1-16 ◽  
Author(s):  
V Evrard ◽  
K Soetaert ◽  
CHR Heip ◽  
M Huettel ◽  
MA Xenopoulos ◽  
...  
Keyword(s):  
Food Web ◽  
Sandy Sediment ◽  
Carbon And Nitrogen ◽  
Benthic Food Web ◽  
Benthic Food ◽  
Nitrogen Flows

scholarly journals Tracing carbon and nitrogen incorporation and pathways in the microbial community of a photic subtidal sand

2008 ◽  
Vol 53 ◽  
pp. 257-269 ◽  
Author(s):  
V Evrard ◽  
PLM Cook ◽  
B Veuger ◽  
M Huettel ◽  
JJ Middelburg
Keyword(s):  
Microbial Community ◽  
Carbon And Nitrogen ◽  
Nitrogen Incorporation

Absolute and relative content of carbon and nitrogen differ by sex in Ceratopteris richardii gametophytes

Botany ◽  
2016 ◽  
Vol 94 (5) ◽  
pp. 405-410 ◽  
Author(s):  
Taylor T. Goodnoe ◽  
Jeffrey P. Hill
Keyword(s):  
Sex Determination ◽  
Nutrient Availability ◽  
Abiotic Factors ◽  
Sex Expression ◽  
Dry Mass ◽  
Ceratopteris Richardii ◽  
Carbon And Nitrogen ◽  
Individual Fitness ◽  
Nutrient Effects ◽  
Short Time

When habitats are heterogeneous regarding key abiotic factors, and individual organisms have no control over the environment in which they develop, labile sex expression can allow individuals to adjust their sex based on local environmental conditions, resulting in increased individual fitness. Sexual lability is found extensively in homosporous ferns, where sex expression is often regulated via the pheromone antheridiogen. Nutrient availability may provide additional signals for sex determination in fern gametophytes, particularly if nutrient demands required for sexual development differ by sex. The model fern Ceratopteris richardii Brongn. has a well-characterized antheridiogen response and short time to sexual maturity. Although tests for nutrient effects on sex determination have been conducted in this fern, tests for differences in nutrient demands by sex have not. Elemental analysis demonstrated that 14-day-old ameristic male and meristic female or hermaphrodite gametophytes of C. richardii differ significantly in their relative carbon and nitrogen masses, resulting in significantly dissimilar C:N ratios between the sexes. Average gametophyte dry mass in ameristic males was approximately half that of meristic plants of the same age, and contained less N than meristic gametophytes in both relative and absolute terms. Those characteristic differences in elemental composition imply that variation in nutrient availability could potentially influence sex expression in C. richardii gametophyte populations, rather than regulation of sex determination by the antheridiogen system alone.

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