TheCladophoraresurgence in Lake Ontario: characterization and implications for management
| Autor: | Martin T. Auer, Anika Kuczynski, Colin N. Brooks, Amanda G. Grimm |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
0106 biological sciences
Biomass (ecology) biology Ecology 010604 marine biology & hydrobiology Phosphorus chemistry.chemical_element Mussel 010501 environmental sciences Aquatic Science biology.organism_classification 01 natural sciences Algal bloom Invasive species chemistry Aquatic plant Cladophora Nuisance Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Canadian Journal of Fisheries and Aquatic Sciences. 73:999-1013 |
| ISSN: | 1205-7533 0706-652X |
| DOI: | 10.1139/cjfas-2015-0460 |
| Popis: | Nuisance growth of the alga Cladophora, reported from Lake Ontario since the 1930s, abated in the decades following implementation of phosphorus control measures in the 1970s. Our examination of beach fouling records and historical observations of algal biomass has confirmed literature reports that a resurgence in nuisance growth of Cladophora has occurred since invasion of Great Lakes waters by dreissenids. Our findings indicate that the growth rate of Cladophora (specific rate of net photosynthesis) has decreased by 44% since 1972 in response to phosphorus controls. However, improved transparency, a response to mussel activity, has increased the maximum depth colonizable by Cladophora by a factor of 5 over that same interval. The net result is a sixfold increase in production potential since the late 1980s (the Post-P Management II Period) and a threefold increase since the 1970s (the Pre-P Management Period). Although the Cladophora resurgence has been driven by dreissenid modification of the light environment, phosphorus management remains the only alternative for reversing and ameliorating nuisance conditions. Elucidation of the nature of the Cladophora resurgence will aid decision-makers in maintaining a focus on phosphorus management as the appropriate means of remediating nuisance growth of the alga. |
| Databáze: | OpenAIRE |
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