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2 edition of Some factors influencing zooplankton populations in Kootenay Lake, British Columbia, Canada. found in the catalog.

Some factors influencing zooplankton populations in Kootenay Lake, British Columbia, Canada.

Kenneth G. Taylor

Some factors influencing zooplankton populations in Kootenay Lake, British Columbia, Canada.

by Kenneth G. Taylor

  • 216 Want to read
  • 22 Currently reading

Published .
Written in English

    Subjects:
  • Plankton -- British Columbia -- Kootenay Lake.,
  • Zooplankton -- British Columbia -- Kootenay Lake.

  • The Physical Object
    Paginationvi, 102 l.
    Number of Pages102
    ID Numbers
    Open LibraryOL17779982M

    Total phosphorus contributions to the Kootenay River from all sources in British Columbia above Lake Koocanusa were estimated to be less than pounds per year (Rocchini et al., B), which was about % of the amount contributed by Cominco's fertilizer plant in the early s. Nearshore zooplankton populations have declined even more than offshore populations following the appearance of M. relicta in Flathead Lake. Densities of all 18 w w macrozooplankton in this region in were severely depressed throughout the year compared to

      In North America, M. diluviana was introduced to lakes in an attempt to increase kokanee production by replicating results from Kootenay Lake, British Columbia, Canada, where the introduction of mysids in as supplementary food for Kamloops rainbow trout led instead to trophy kokanee in the 's (Martin and Northcote, , Sparrow et al. The lake is typically thermally stratified between late June and September to an average depth of approximately m. Each year from to , 50, to , mysids from Waterton Lake, Alberta, Canada and Kootenay Lake, British Columbia, Canada were introduced to LPO (Rieman and Falter ). Annual surveys confirmed.

    The vertical distribution of zooplankton can have substantial influence on trophic structure in freshwater systems, particularly by determining spatial overlap for predator/prey dynamics and influencing energy transfer. The zooplankton community in some of the Laurentian Great Lakes has undergone changes in composition and declines in total biomass, especially after   Zooplankton samples were collected from Lake Aleknagik approximately every ten days at six stations arrayed across the length of the lake between June and September from to Plankton were sampled with vertical tows of a μm mesh conical net with a m diameter and a width:length ratio of


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Some factors influencing zooplankton populations in Kootenay Lake, British Columbia, Canada by Kenneth G. Taylor Download PDF EPUB FB2

British Columbia Ministry of Environment # Victoria Street, Nelson, British Columbia V1L 4K3, Canada abstRact.—We examined the relative abundance of zooplankton populations and burbot Lota lota in six oligotrophic lakes and one river in British Columbia, Cana-da and the Kootenai River, Idaho, USA.

Burbot were primarily sampled November. Study area. Kootenay Lake is a large ( km 2) impounded natural montane lake located between the Selkirk and Purcell mountain ranges in the southeast corner of British Columbia ().The main lake is km long with a maximum width of ∼4 km, mean depth of 94 m, and maximum depth of m (Daley et al.

).Kootenay Lake has two main arms (the North and South arms) Author: Eva U. Schindler, Bahman Shafii, Paul J. Some factors influencing zooplankton populations in Kootenay Lake, William J. Price, Charlie Holderman, Ken I. Ashley. Zooplankton (Crustacea and Rotifera) density estimates taken from water bodies in the Pacific Northwest (Idaho and British Columbia, Canada) in and N/L represents number of zooplankton.

Factors affecting the production of zooplankton in lakes1 B.J. Shuter and K.K. Ing Abstract: Multiple regression analysis and analysis of covariance were used to assess the degree to which observed variation in rates of production among lake zooplankton populations could be accounted for by variation in physical and biological factors.

By the s, kokanee populations were in trouble in Kootenay and the Gerrard trout followed. Several factors, including blockage of historical spawning sites with dams, decreased nutrient inputs, overexploitation, and competition between young kokanee and Mysis relicta were likely responsible.

In response, artificial fertilization was attempted in one portion of the lake to test its effectiveness as a. Zooplankton collected from vertical net tows were related to the environmental variables from 98 lakes from the Interior Plateau of British Columbia.

Canonical correspondence analysis showed that both salinity and ionic composition (pH and Mg) of the lake-water made major and significant contributions to the first two ordination axes (λ= and respectively,P.

Mid-summer zooplankton samples were collected over 29 years from 25 lakes situated along the Front Range of the Rocky Moun-tains in Jasper, Banff, and Kootenay national parks of Alberta and British Columbia, Canada.

The lakes were all within the montane (– m above sea level (ASL)) and lower subalpine (– m ASL) ecozones. Salinity and nutrients in the water were the main environmental factors that affected the distribution of the zooplankton species. Key words:Massa Lagoon, zooplankton, environmental factors.

The region, in the southeast corner of British Columbia, includes natural, clean, uncrowded activities and experiences that reflect the Kootenay mountain lifestyle and culture in Canada’s west.

Each community offers its own unique vibe and fascinating history. Here are some of our “fun facts” about many of Kootenay city, towns & villages. Kootenay Lake is a lake located in British Columbia, Canada and is part of the Kootenay lake has been raised by the Corra Linn Dam and has a dike system at the southern end, which, along with industry in the ss, has changed the ecosystem in and around the water.

The Kootenay Lake ferry is a year-round toll-free ferry that crosses between Kootenay Bay and Balfour. Plankton Phytoplankton and zooplankton form the base of Lake Champlain’s food web, sometimes called the ‘lower food web.’ These microscopic floating plants, animals, and bacteria are the most numerous and most simple organisms.

Complex predator-prey relationships lead to the top of the food web—predator fish such as largemouth bass, northern pike, lake trout, and salmon. the lake was meant to represent the mean for the euphotic zone based on measurements at 1, 5, and 10 meters.

The function was chosen so that maximum temperatures occurred during late July and August (Table 1) coinciding with those found in Kootenay Lake.

The other major influencing factor is of course the Kootenay River. Catchment % forest cover, a watershed level variable similar to % wetland, indirectly influenced ZP via both in‐lake variables and community properties, likely represents the integration of several watershed processes influencing lake chemistry, resource availability and even physical structure that affect zooplankton community composition and interactions.

Factors influencing zooplankton size structure at contrasting temperatures in coastal shallow lakes: Implications for effects of climate change An in-lake mesocosm approach, Hydrobiologia, /s, ().

Crossref. Canada, Journal of Paleolimnology. The unusually small contribution of Crustacea to total zooplankton biomass in the lake could be attributed to predation by Chaoborus. While Chaoborus can regulate zooplankton community structure in acidified, fish—free lakes, the frequency of occurrence of such control remains uncertain.

Experimental fertilization was conducted on Kootenay Lake, B.C. from to to compensate for nutrients lost behind hydroelectric dams upstream of the lake. Declining nutrient loads were correlated with lower in-lake nutrient concentrations, chlorophyll a concentrations, and macrozooplankton densities, and a dramatic decline in kokanee salmon {Oncorhynchus nerka) stocks.

A simulation. ZOOPLANKTON BIODIVERSITY AND LAKE TROPHIC STATE: EXPLANATIONS INVOKING RESOURCE ABUNDANCE AND DISTRIBUTION.

Allain. Barnett Canada. Zooplankton community richness was regressed against TP, the spatial distribution of phytoplankton spectral groups, and the relative biomass of spectral groups.

Interior British Columbia, Canada, Ecosystems. Thompson, L.C. Abundance and production of zooplankton and kokanee salmon (Oncorhynchus nerka) in Kootenay Lake, British Columbia during artificial fertilization [online].

Ph.D. thesis, Department of Zoology, The University of British Columbia, Vancouver, British Columbia, Canada. The total zooplankton count, including copepods, and its dominant species showed significant positive correlations with temperature, pH and total phytoplankton density.

However, negative correlations were detected between densities of rotifers, and salinity and dissolved oxygen. A community model may be considered stable when, in the absence of exogenous variation, all population trajectories encircle or asymptotically approach equilibrium.

In this paper, community models in which, in the absence of analytical indications of stability, all populations either A real, though simplified, ecological system consisting of Daphnia galeata and its algal food source in an.

pact zooplankton populations directly or be an indicator of processes that cause changes in distribution patterns on the mesoscale. In this chapter we evaluate our current understanding of specific processes influencing the ecology and popUlation dynamics of some of the most abundant meso- and macro­ zooplankton.The zooplankton communities in these lakes have become increasingly similar to those characteristic of cold, oligotrophic systems, such as Lake Superior, which have low nutrient levels.

Populations of calanoid copepods, considered oligotrophic indicators, have increased, while cladoceran populations .Annual and seasonal changes in distribution and abundance of six species of macro-zooplankton (Cyclops bicuspidatus thomasi, Diaptomus ashlandi, Daphnia galeata mendotae, Diaph- anosoma leuchtenbergianum, Bosmina coregoni, and Mysxs relicta.) twgre studied in Kootenay Lake, a body of water extending over km in southeastern British Columbia.

Differences between two years.