Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes
1 We quantified the effects of forest fire on littoral benthic macroinvertebrate biomass on a boreal subarctic plateau in Alberta, Canada. Water chemistry and benthos were collected from six lakes, 1 and 2 years following a 1995 fire which burned about 91% of their catchments (i.e. recently burnt la...
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crwiley:10.1046/j.1365-2427.2001.00682.x 2024-06-23T07:57:02+00:00 Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes Scrimgeour, Garry J. Tonn, William M. Paszkowski, Cynthia A. Goater, Cameron 2001 http://dx.doi.org/10.1046/j.1365-2427.2001.00682.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.2001.00682.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.2001.00682.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Freshwater Biology volume 46, issue 3, page 367-378 ISSN 0046-5070 1365-2427 journal-article 2001 crwiley https://doi.org/10.1046/j.1365-2427.2001.00682.x 2024-06-11T04:44:26Z 1 We quantified the effects of forest fire on littoral benthic macroinvertebrate biomass on a boreal subarctic plateau in Alberta, Canada. Water chemistry and benthos were collected from six lakes, 1 and 2 years following a 1995 fire which burned about 91% of their catchments (i.e. recently burnt lakes), and from four other lakes whose catchments burned between 1961 and 1985 (i.e. previously burnt lakes). Seven lakes whose catchments had not burned since at least 1957 served as reference systems. 2 Total benthic macroinvertebrate biomass and biomass of Chironomidae were 1.5‐ and 2‐fold ( P <0.05) greater within recently burnt lakes than in reference systems, whereas the biomass of Oligochaeta ( P =0.06) and Amphipoda ( P =0.07) were marginally higher in burnt than reference lakes. Burnt lakes had greater colour ( P< 0.05) and marginally ( P =0.06) higher concentrations of soluble reactive phosphorus than reference lakes. 3 Nutrient diffusing substrata deployed in a previously and a recently burnt lake indicated that littoral epilithic communities were co‐limited by the availability of phosphorus (P) and nitrogen (N), although co‐limitation was stronger in the previously burnt than the recently burnt lake. Epilithic chlorophyll a on natural stone surfaces in the recently burnt lake was also 3.5 times higher ( P <0.05) than that from the previously burnt lake. 4 Among all 17 lakes, total benthic biomass and biomass of Chironomidae, Amphipoda and Nematoda, were significantly ( P <0.05) or marginally ( P= 0.06) related to soluble reactive phosphorus (SRP) but not dissolved inorganic nitrogen or colour. These regressions explained between 11% and 64% of variation in benthic biomasses. 5 Linear regressions and second‐order polynomials explained 18% and 24% of the variation in concentrations of SRP and water colour with time since fire, respectively, and between 22% and 70% of variation in total biomass and biomass of the five dominant invertebrate groups. These analyses suggest that benthic biomasses ... Article in Journal/Newspaper Subarctic Wiley Online Library Burnt Lakes ENVELOPE(-113.919,-113.919,57.284,57.284) Canada Freshwater Biology 46 3 367 378 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
1 We quantified the effects of forest fire on littoral benthic macroinvertebrate biomass on a boreal subarctic plateau in Alberta, Canada. Water chemistry and benthos were collected from six lakes, 1 and 2 years following a 1995 fire which burned about 91% of their catchments (i.e. recently burnt lakes), and from four other lakes whose catchments burned between 1961 and 1985 (i.e. previously burnt lakes). Seven lakes whose catchments had not burned since at least 1957 served as reference systems. 2 Total benthic macroinvertebrate biomass and biomass of Chironomidae were 1.5‐ and 2‐fold ( P <0.05) greater within recently burnt lakes than in reference systems, whereas the biomass of Oligochaeta ( P =0.06) and Amphipoda ( P =0.07) were marginally higher in burnt than reference lakes. Burnt lakes had greater colour ( P< 0.05) and marginally ( P =0.06) higher concentrations of soluble reactive phosphorus than reference lakes. 3 Nutrient diffusing substrata deployed in a previously and a recently burnt lake indicated that littoral epilithic communities were co‐limited by the availability of phosphorus (P) and nitrogen (N), although co‐limitation was stronger in the previously burnt than the recently burnt lake. Epilithic chlorophyll a on natural stone surfaces in the recently burnt lake was also 3.5 times higher ( P <0.05) than that from the previously burnt lake. 4 Among all 17 lakes, total benthic biomass and biomass of Chironomidae, Amphipoda and Nematoda, were significantly ( P <0.05) or marginally ( P= 0.06) related to soluble reactive phosphorus (SRP) but not dissolved inorganic nitrogen or colour. These regressions explained between 11% and 64% of variation in benthic biomasses. 5 Linear regressions and second‐order polynomials explained 18% and 24% of the variation in concentrations of SRP and water colour with time since fire, respectively, and between 22% and 70% of variation in total biomass and biomass of the five dominant invertebrate groups. These analyses suggest that benthic biomasses ... |
format |
Article in Journal/Newspaper |
author |
Scrimgeour, Garry J. Tonn, William M. Paszkowski, Cynthia A. Goater, Cameron |
spellingShingle |
Scrimgeour, Garry J. Tonn, William M. Paszkowski, Cynthia A. Goater, Cameron Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes |
author_facet |
Scrimgeour, Garry J. Tonn, William M. Paszkowski, Cynthia A. Goater, Cameron |
author_sort |
Scrimgeour, Garry J. |
title |
Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes |
title_short |
Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes |
title_full |
Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes |
title_fullStr |
Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes |
title_full_unstemmed |
Benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes |
title_sort |
benthic macroinvertebrate biomass and wildfires: evidence for enrichment of boreal subarctic lakes |
publisher |
Wiley |
publishDate |
2001 |
url |
http://dx.doi.org/10.1046/j.1365-2427.2001.00682.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1046%2Fj.1365-2427.2001.00682.x https://onlinelibrary.wiley.com/doi/pdf/10.1046/j.1365-2427.2001.00682.x |
long_lat |
ENVELOPE(-113.919,-113.919,57.284,57.284) |
geographic |
Burnt Lakes Canada |
geographic_facet |
Burnt Lakes Canada |
genre |
Subarctic |
genre_facet |
Subarctic |
op_source |
Freshwater Biology volume 46, issue 3, page 367-378 ISSN 0046-5070 1365-2427 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1046/j.1365-2427.2001.00682.x |
container_title |
Freshwater Biology |
container_volume |
46 |
container_issue |
3 |
container_start_page |
367 |
op_container_end_page |
378 |
_version_ |
1802650467683008512 |