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Results 11 - 20
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88
A Second Breeding Site for Ross’s Gull (Rhodostethia rosea
, 1999
"... ABSTRACT. Only 15 cases of breeding of Ross’s gull Rhodostethia rosea are known outside of Siberia. While numerous birds are regularly seen in the fall at Point Barrow, Alaska, until now only one breeding locality has been known for Nunavut, Canada. We found a second breeding locality in Nunavut in ..."
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in the northwestern corner of Prince Charles Island (Foxe Basin). We observed one pair incubating two eggs on a small island (30 m in diameter) situated in a medium-sized lake, on a low plateau at the top of a complex of raised beaches. None of the reports on aerial or land surveys of this region have mentioned
Some observations of currents in the hypolimnion of Lake Mendota
, 1960
"... Observations of hypolimnetic currents in Lake Mendota, intcgratcd over entire seiche periods, indicate that steady motions exist below the thermocline. Seiche currents and turbulcncc are shown to bc insufficient to explain the observed currents. Hutchinson ( 1957, p, 287, p, 341) has suggested that ..."
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that deep water currents, at least in medium-sized stratified lakes, are pri-marily due to internal seiches. He also quotes Mortimer ( 1953) to the same effect. On the basis of the small amount of hub-lished data on the observed currents below the thermocline and the fact that both the usual “surface
The Impact of Fish Predation and Cyanobacteria on Zooplankton Size Structure in 96 Subtropical Lakes
"... Zooplankton are relatively small in size in the subtropical regions. This characteristic has been attributed to intense predation pressure, high nutrient loading and cyanobacterial biomass. To provide further information on the effect of predation and cyanobacteria on zooplankton size structure, we ..."
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by the normalized biomass size spectrum, which showed a unimodal shape with a peak at medium sizes in Type 2 lakes and a peak at small sizes in Type 3 lakes. These results indicated a relative increase in medium-sized and small-sized species in Types 2 and 3 lakes, respectively. Our results suggested that fish
Sedimentological characteristics of Perumal lake Cuddalore District,
"... A thorough knowledge of sedimentary processes that cause the production, transportation and deposition in varied hydrodynamic conditions, is most important in environmental reconstruction. Size analysis of sediment is an essential requirement to understand their mechanism of transportion and deposit ..."
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and deposition. Textural parameters are primarily related to made of transportation and energy condition of the transporting medium in this study it is focused on classification of grain size certain measures (Mean, Sorting, Skewnees and kurtosis) of special relevance in lake sedimentological contexts and some
Calibration and Testing of a Hydrodynamic Model of the Gippsland Lakes
"... Abstract: The calibration and testing of a complex, branched, one-dimensional hydrodynamic model of the Gippsland Lakes in south east Victoria is described in this paper. The model covers the entire lakes system including the five major rivers flowing into the lakes (total catchment area of 20,600 k ..."
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within the Lakes system, which have been in place since late 1998. These data include a number of low to medium-sized flood events, and a major wind event on Boxing Day 1998. Input data for the period 1977-2001 were available but only one water-level site was available over this time. Calibration
Parameterization of Lakes in Numerical Models for Environmental Applications
"... Lakes significantly affect the structure of the atmospheric surface layer and therefore the surface fluxes of heat, water vapour and momentum. This effect has not been systematically studied so far and is poorly understood. In most numerical weather prediction (NWP), climate modelling and other nume ..."
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-rate-of-change. It is com-mon for NWP systems to assume that the water surface temperature can be kept constant over the forecast period. The assumption is to some extent justified for seas and deep lakes. It is doubtful for small-to-medium size relatively shallow lakes, where the short-term variations of the surface
K&C Science Report – Phase 1 Global Lake Census
"... Abstract — Lake size is a strong control on lake function and on how lakes interact with the environment. For example, lake size is strongly related to carbon burial rates in lake sediments. Lake size distribution (how many small, medium, and large lakes, occur per unit area) can be used to extrapol ..."
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Abstract — Lake size is a strong control on lake function and on how lakes interact with the environment. For example, lake size is strongly related to carbon burial rates in lake sediments. Lake size distribution (how many small, medium, and large lakes, occur per unit area) can be used
Bacterial Community Composition of Size-Fractioned Aggregates within the Phycosphere of Cyanobacterial Blooms in a Eutrophic Freshwater Lake
, 2014
"... Bacterial community composition of different sized aggregates within the Microcystis cyanobacterial phycosphere were determined during summer and fall in Lake Taihu, a eutrophic lake in eastern China. Bloom samples taken in August and September represent healthy bloom biomass, whereas samples from O ..."
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recovered a large bacterial diversity. The community of each size aggregate was highly organized, indicating highly specific conditions within the Microcystis phycosphere. While the communities of medium and small-size aggregates clustered together in August and September samples, large- and medium-size
Author's personal copy Relative demand by double-crested cormorants and anglers for fish production from lakes on Manitoulin Island, Lake Huron
"... The magnitude of angler harvest (kg·ha ) were compared for a set of lakes (N = 11) on Manitoulin Island. Empirical models relating total phosphorus to total fish production as well as production to body mass were used to scope the possible range of fish production and to partition production among ..."
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small, medium and large size segments of fish populations, respectively. Medium (66-112 g) and large (>200 g) size segments were defined as size categories targeted by cormorants (stomach diet analysis) and anglers (creel interviews), respectively. Angling effort and cormorant density were estimated
River systems (NatureServe 2010). Current Threats:
"... Rayed beans occur in fine sand in the shallow areas of medium-sized to large rivers (Spoo 2008). Rayed beans were historically known from 106 streams, lakes, and some man-made canals in 10 states and 3 service regions. The species occurred in parts of the ..."
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Rayed beans occur in fine sand in the shallow areas of medium-sized to large rivers (Spoo 2008). Rayed beans were historically known from 106 streams, lakes, and some man-made canals in 10 states and 3 service regions. The species occurred in parts of the
Results 11 - 20
of
88
