Shortreed, K. R. S.
Most widely held works by K. R. S Shortreed
Limnological results from the 1979 British Columbia lake enrichment program by K. R. S Shortreed ( Book )
5 editions published in 1981 in English and held by 35 libraries worldwide
Limnological investigations were conducted on 21 oligotrophic British Columbia lakes. At weekly intervals during the growing season, 12 of the lakes were fertilized with ammonia nitrate and ammonium phosphate. Phosphorous loads from fertilizer were from 24 to over 200% above annual natural loads. Annual production in the lakes averaged 31 g C.m -2 and ranged from 14 to 73. Mean epilimnic chlorophyll concentrations in mose lakes were between 1 and 2 mg.m -3. Response of the lakes phytoplankton communities to fertilization was quite variable, but production and biomass tended to be higher during fertilization. The response and variability are discussed with reference to annual variation in various physical, chemical and biological factors.
Seasonal distributions of bacterioplankton numbers and activities in eight fertilized or untreated oligotrophic British Columbia lakes by E. A MacIsaac ( Book )
3 editions published in 1981 in English and held by 32 libraries worldwide
Seasonal changes in the vertical distributions of total bacterioplankton number (A0DC) and glucose (3H) turnover-times are discribed for eight temperature, oligotrophic British Columbia lakes. This group included fertilized and untreated lakes, ranging in water clarity from clear to mildly dystrophic (humic stained) or glacially turbid. Mean annual bacteria numbers (0-10 m) ranged from 0.41 to 0.95.10 6.mL -1 and mean annual glucose turnover-times ranged from 125 to 2200 h. The lakes are compared and monthly changed in bacteria numbers and activity are described in relation to flushing, stratification, fertilization, and various physical, chemical, and biological variables.
An assessment of the limnological status and productive capacity of Babine Lake, 25 years after the inception of the Babine Lake Development Project by K. S Shortreed ( Book )
6 editions published in 2000 in English and held by 22 libraries worldwide
Construction of spawning channels in the late 1960's during the Babine Lake Development Program (BLDP) has resulted in increased sockeye escapements and fry densities in most years from the early 1970's to the present. In 1994 and 1995 we carried out a limnological study of Babine Lake to determine its current trophic status and rearing capacity for juvenile sockeye salmon (Oncorhynchus nerka). We investigated the effect of the increased escapements and fry densities on lake physics, chemistry, lower trophic levels, and sockeye diet by comparing our data with similar data collected before (Johnson 1961, 1964) and shortly after (Stockner and Shortreed 1975; Rankin 1977) the inception of the BLDP. Current spring overturn total phosphorus concentrations (5-9 mg/L), seasonal average chlorophyll concentrations (1.9-2.5 mg/L), and bacteria numbers (<1.7x10⁶/mL) indicate the lake is in the middle to upper range of oligotrophy. The average C:N:P ratio was 314:31:1, indicating that the lake was P-limited. Total phosphorus loading has increased approximately 38% from estimates prior to enhancement, primarily because of increased sockeye escapements (i.e. nutrients from carcasses). Seasonal daily photosynthetic rates were 125 mg C·m-2·d-1 in 1994 and 155 mg C·m⁻²·d⁻¹ in 1995, higher than the 1973 average of 100 mg C·m⁻²·d⁻¹. Daphnia were the dominant prey item of juvenile sockeye both before BLDP and during our study. However, in our study grazing pressure on the zooplankton community (inferred from fall fry densities and smolt numbers) was much lower than in most years after BLDP and was similar to years before BLDP. Available evidence indicates that despite consistently higher fry densities as a result of BLDP, Babine Lake remains a quality nursery area for juvenile sockeye and its rearing capacity has not been exceeded. However, evidence from 1973 diets suggests that some of the higher post-BLDP fry recruitments have neared or reached the lake's rearing capacity and that further increases in fry recruitment would not result in additional smolt production.
A comparative limnological survey of 19 sockeye salmon (Oncorhynchus nerka) nursery lakes in the Fraser River system, British Columbia by J. G Stockner ( Book )
4 editions published in 1983 in English and held by 22 libraries worldwide
Trophic status and rearing capacity of smaller sockeye nursery lakes in the Skeena river system ( Book )
5 editions published in 1998 in English and held by 20 libraries worldwide
Phytoplankton fractionation studies in Great Central Lake, British Columbia : a nutrient-enriched sockeye salmon (Oncorhynchus nerka) nursery lake by Anne C Costella ( Book )
4 editions published in 1979 in English and held by 20 libraries worldwide
Limnological studies of 13 sockeye salmon (Oncorhynchus nerka) nursery lakes in British Columbia, Canada by J. G Stockner ( Book )
2 editions published in 1979 in English and held by 20 libraries worldwide
Limnological survey of 35 sockeye salmon (Oncorhynchus nerka) nursery lakes in British Columbia and the Yukon Territory by J. G Stockner ( Book )
4 editions published in 1978 in English and held by 19 libraries worldwide
Results of survey in 1977 to identify lakes most likely to benefit from fertilization in future years.
Trophic status and rearing capacity of Francois and Fraser Lakes by K. R. S Shortreed ( Book )
4 editions published in 1996 in English and held by 17 libraries worldwide
Response of attached algae to whole-lake fertilization experiments in five British Columbia coastal lakes by K. R. S Shortreed ( Book )
2 editions published in 1978 in English and held by 17 libraries worldwide
Artificially induced upwelling in Great Central Lake, British Columbia by J. G Stockner ( Book )
2 editions published in 1978 in English and held by 17 libraries worldwide
Summary in English and French.
Limnology of Cultus Lake, British Columbia by K. R. S Shortreed ( Book )
2 editions published in 2007 in English and held by 15 libraries worldwide
Cultus Lake is located in British Columbia's eastern Fraser Valley, approximately 10 km south of the city of Chilliwack. The lake and its surrounding drainage basin are heavily utilized residential/recreational areas. This document describes a limnology study conducted at Cultus Lake. Limnological data were collected once monthly from April to November 2001, and from January to December of 2002. In 2003, the lake was sample four times (January to March and August). The further chemical analysis of data were carried out. Results of the analysis are discussed in the following fields: physics, chemistry, stream chemistry, metals, bacteria and phytoplankton, zooplankton, rearing capacity, quality of Cultus Lake rearing environment, current and past productivity.--Includes text from document.
The British Columbia lake fertilization program : limnological results from the first 2 years of nutrient enrichment by J. G Stockner ( Book )
4 editions published in 1980 in English and held by 14 libraries worldwide
Preliminary categorization of the productivity of 37 coastal and Skeena River system lakes in British Columbia by K. R. S Shortreed ( Book )
2 editions published in 2007 in English and held by 13 libraries worldwide
A limnological survey of 37 lakes was carried out in British Columbia's north coast and Skeena River system. The objectives of this study was to collect limnological data which could be used to describe the lakes' physical, chemical, and biological environments; to categorize the lakes' current tropic status; and to provide a first estimate of the lakes' rearing capacity for juvenile sockeye. This report presents the data and discusses the results.--Includes text from document.
Phytoplankton succession and primary production in Babine Lake, British Columbia by J. G Stockner ( Book )
1 edition published in 1974 in English and held by 13 libraries worldwide
Results of a three-year (1996-1998) limnological study of Takla, Trembleur and Stuart Lakes by K Malange ( Book )
2 editions published in 2005 in English and held by 12 libraries worldwide
Results of a three-year limnological investigation of three oligotrophic, sockeye nursery lakes in the Stuart system of British Columbia are reported. This investigation is part of a study to determine productive capacity and trophic status of the Stuart System lakes (Takla, Trembleur, and Stuart). We sampled a total of 10 locations in main basins of the lakes monthly (May-October) from 1996 to 1998, for physical, chemical and biological variables. Epilimnetic data, summarized for each station and date and seasonal means for each station and whole lake are presented in tables. Temperature profiles and selected seasonal data are shown graphically.
Attached algal growth in Carnation Creek, a coastal rainforest stream on Vancouver Island, British Columbia by J. G Stockner ( Book )
1 edition published in 1975 in English and held by 12 libraries worldwide
Limnological results from the 1983 British Columbia Lake Enrichment Program by B. H Nidle ( Book )
4 editions published in 1984 in English and held by 9 libraries worldwide
The Lake Enrichment Program (LEP) of the Federal-Provincial Salmonid Enhancement Program (SEP) commenced in 1977 with the fertilization and study of six lakes. Results of the 1983 limnology subprogram of the British Columbia Lake Enrichment Program (LEP) are presented. Twenty-two stations in 15 lakes were sampled for a variety of physical, chemical, and biological variables. The numbers of times each lake was sampled ranged from one to eight, but most lakes were sampled once monthly from April or May to October. Summarized data for each station and date are presented, and raw data are contained in the appendix tables.--Includes text from document.
Limnological results from the 1984 British Columbia Lake Enrichment Program by B. H Nidle ( Book )
4 editions published in 1985 in English and held by 7 libraries worldwide
The Lake Enrichment Program, under the auspices of the Federal-Provincial Salmonid Enhancement Program (SEP), commenced in 1977 with the fertilization and study of six lakes. In 1984, 10 lakes were fertilized and limnological surveys were conducted on a total of 14 coastal British Columbia lakes. Datat obtained from earlier work on many of these lakes and the rationale and objectives of these continuing studies have been previously reported. The number of times each lake was sampled ranged from one to 22. Summarized data for each station and date are presented, and raw data are contained in the Appendix Tables. Data presented in this report will be used to determine the effect of fertilizer additions on treated lakes, and to calculate appropriate fertilizer loads in untreated lakes which are candidates for fertilization.--Includes text from document.
The British Columbia lake fertilization program : the first 2 years of nutrient enrichment by J. G Stockner ( Book )
1 edition published in 1980 in English and held by 7 libraries worldwide
Algae Algae--Growth British Columbia British Columbia--Carnation Creek British Columbia--Cultus Lake British Columbia--Fraser River Watershed British Columbia--Pacific Coast British Columbia--Skeena River British Columbia--Stuart Lake British Columbia--Takla Lake Eutrophication Fisheries Fisheries--Hydrologic factors Fish populations Fish stock assessment Freshwater biology Freshwater microbiology Freshwater phytoplankton Freshwater productivity Freshwater zooplankton Lake ecology Lake restoration Lakes Lakes--Fertilization Limnology Phytoplankton Plankton populations Primary productivity (Biology) Salmon Sockeye salmon Sockeye salmon fisheries Sockeye salmon--Growth Sockeye salmon--Habitat Statistics Upwelling (Oceanography) Water--Analysis Water quality Yukon Territory
Shortreed, K. S.