Recruitment of resting stages may induce blooms of Microcystis at low N : P ratios
Ståhl-Delbanco, Annika LU ; Hansson, Lars-Anders LU
and Gyllström, Mikael
LU
(2003)
In Journal of Plankton Research
25(9).
p.1099-1106
- Abstract
- Some species of cyanobacteria form resting stages at the sediment surface when environmental conditions become unfavourable. As conditions turn more favourable, these resting stages hatch to the water phase, where the cells grow, reproduce, and sometimes form blooms. Since blooms of cyanobacteria have become an increasing threat to inland and brackish waters, it is important to assess the mechanisms and processes involved in the initiation of such blooms. One such mechanism is recruitment from the sediment surface. Potential factors regulating the recruitment of resting stages include variations in nutrient concentrations and ratios, as well as variations in grazing. To investigate how the recruitment of Microcystis responds to different... (More)
- Some species of cyanobacteria form resting stages at the sediment surface when environmental conditions become unfavourable. As conditions turn more favourable, these resting stages hatch to the water phase, where the cells grow, reproduce, and sometimes form blooms. Since blooms of cyanobacteria have become an increasing threat to inland and brackish waters, it is important to assess the mechanisms and processes involved in the initiation of such blooms. One such mechanism is recruitment from the sediment surface. Potential factors regulating the recruitment of resting stages include variations in nutrient concentrations and ratios, as well as variations in grazing. To investigate how the recruitment of Microcystis responds to different levels of these factors, we performed an enclosure experiment (zooplankton abundances were regulated by predation from fish). We found that recruitment and growth were most pronounced at the second highest nutrient concentration (average concentrations were 498 mug l(-1) of dissolved nitrogen and 134 mug l(-1) of total phosphorus), while no direct response to different grazing levels was detected. We also found that resting stages can be important for initiating and sustaining blooms. The environmental conditions most important in regulating the recruitment rate from resting stages corresponded to the requirements of the plankton cells, namely high nutrient addition and low N:P ratio. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/136799
- author
- Ståhl-Delbanco, Annika
LU
; Hansson, Lars-Anders
LU
and Gyllström, Mikael
LU
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Journal of Plankton Research
- volume
- 25
- issue
- 9
- pages
- 1099 - 1106
- publisher
- Oxford University Press
- external identifiers
-
- wos:000185148600008
- scopus:0141569687
- ISSN
- 0142-7873
- DOI
- 10.1093/plankt/25.9.1099
- language
- English
- LU publication?
- yes
- id
- 0d4f92a4-f949-456c-8822-d5726ae1ee03 (old id 136799)
- date added to LUP
- 2016-04-01 15:40:05
- date last changed
- 2022-03-07 00:46:35
@article{0d4f92a4-f949-456c-8822-d5726ae1ee03,
abstract = {{Some species of cyanobacteria form resting stages at the sediment surface when environmental conditions become unfavourable. As conditions turn more favourable, these resting stages hatch to the water phase, where the cells grow, reproduce, and sometimes form blooms. Since blooms of cyanobacteria have become an increasing threat to inland and brackish waters, it is important to assess the mechanisms and processes involved in the initiation of such blooms. One such mechanism is recruitment from the sediment surface. Potential factors regulating the recruitment of resting stages include variations in nutrient concentrations and ratios, as well as variations in grazing. To investigate how the recruitment of Microcystis responds to different levels of these factors, we performed an enclosure experiment (zooplankton abundances were regulated by predation from fish). We found that recruitment and growth were most pronounced at the second highest nutrient concentration (average concentrations were 498 mug l(-1) of dissolved nitrogen and 134 mug l(-1) of total phosphorus), while no direct response to different grazing levels was detected. We also found that resting stages can be important for initiating and sustaining blooms. The environmental conditions most important in regulating the recruitment rate from resting stages corresponded to the requirements of the plankton cells, namely high nutrient addition and low N:P ratio.}},
author = {{Ståhl-Delbanco, Annika and Hansson, Lars-Anders and Gyllström, Mikael}},
issn = {{0142-7873}},
language = {{eng}},
number = {{9}},
pages = {{1099--1106}},
publisher = {{Oxford University Press}},
series = {{Journal of Plankton Research}},
title = {{Recruitment of resting stages may induce blooms of Microcystis at low N : P ratios}},
url = {{http://dx.doi.org/10.1093/plankt/25.9.1099}},
doi = {{10.1093/plankt/25.9.1099}},
volume = {{25}},
year = {{2003}},
}