Seasonality of Aulacoseira ambigua abundance and filament length: biogeochemical implications

Autor:	David Poister, Sarah Gray, Andrew M. Farrell, Alyssa Kurth
Rok vydání:	2012
Předmět:	Biogeochemical cycle Ecology Phosphorus fungi chemistry.chemical_element Aquatic Science Biology Spring bloom Seasonality Oceanography medicine.disease Nutrient Agronomy chemistry Abundance (ecology) Phytoplankton Botany medicine Bloom Ecology Evolution Behavior and Systematics
Zdroj:	Plankton and Benthos Research. 7:55-63
ISSN:	1882-627X 1880-8247
Popis:	Aulacoseira ambigua abundance and filament length were measured weekly during spring and autumn bloom periods in Trout Lake, Wisconsin, USA. In addition, several chemical and biological variables thought to influ- ence A. ambigua growth were assessed. Results of the field-based observations were complimented with controlled laboratory experiments to evaluate the effects of phosphorus availability on A. ambigua growth. Relative to the au- tumn bloom period, A. ambigua colonies were generally larger and more abundant in spring prior to the termination of the bloom in June. Chlorophyll-a concentrations indicated that other phytoplankton were also more abundant dur- ing the spring bloom. Batch culture experiments indicated that increased phosphorus availability during the spring bloom contributed to the seasonal increase in A. ambigua filament length and abundance. Increase in A. ambigua fila- ment length in response to increased phosphorus availability is discussed as a mechanism that may increase nutrient removal through sedimentation and subsequently decrease the efficiency of nutrient regeneration in higher productiv- ity lakes.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::0ca2e6f0a51dc9643b0537d4c75532ea https://doi.org/10.3800/pbr.7.55 Zobrazit plný text záznamu