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You searched for: Journal name Aquatic ecology Remove constraint Journal name: Aquatic ecology Publication year rev 7991-2009 Remove constraint Publication year rev: 7991-2009 Source 2009 v.43 no.1 Remove constraint Source: 2009 v.43 no.1
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1. Finding appropriate reference sites in large-scale aquatic field experiments

Author:
Schmidt, Susanne I.; König-Rinke, Marie; Kornek, Katja; Winkelmann, Carola; Wetzel, Markus A.; Koop, Jochen H. E.; Benndorf, Jürgen
Source:
Aquatic ecology 2009 v.43 no.1 pp. 169-179
ISSN:
1386-2588
Subject:
calcium; case studies; community structure; ecosystems; electrical conductivity; field experimentation; habitats; ions; magnesium; nitrates; nutrients; oxygen; pH; phosphorus; species diversity; streams; temperature; temporal variation
Abstract:
... Defining the reference condition is one of the most critical aspects of ecosystem investigations since it describes the baseline against which the experimental sites will be evaluated and compared. In large-scale ecosystem experiments, this reference is ideally another ecosystem which is similar to the experimental system. We investigated two streams for their potential as experimental sites for a ...
DOI:
10.1007/s10452-007-9155-6

2. Spatial and temporal variability of internal and external phosphorus loads in Mona Lake, Michigan

Author:
Steinman, Alan; Chu, Xuefeng; Ogdahl, Mary
Source:
Aquatic ecology 2009 v.43 no.1 pp. 1-18
ISSN:
1386-2588
Subject:
aerobic conditions; autumn; lakes; land cover; land use; phosphorus; pollution load; summer; temporal variation; Michigan
Abstract:
... A study was conducted in Mona Lake, a small eutrophic lake located in western Michigan (USA) to address the temporal and spatial variability of external and internal phosphorus loading. External P load varied among subbasins, which was mostly related to discharge, but also to land use. Black Creek, which drains lands with natural cover and agriculture, accounted for the majority of flow, and total ...
DOI:
10.1007/s10452-007-9147-6

3. Spatial distribution of benthic algae in the Gangqu River, Shangrila, China

Author:
Wu, Naicheng; Tang, Tao; Qu, Xiaodong; Cai, Qinghua
Source:
Aquatic ecology 2009 v.43 no.1 pp. 37-49
ISSN:
1386-2588
Subject:
Achnanthes; Cocconeis; Cymbella; Fragilaria; environmental factors; principal component analysis; rivers; China; Yangtze River
Abstract:
... This study consisted of sampling benthic algae at 32 sites in the Gangqu River, an important upstream tributary of the Yangtze River. Our aims were to characterize the benthic algae communities and relationships with environmental variables. Among the 162 taxa observed, Achnanthes linearis and Achnanthes lanceolata var. elliptica were the dominant species (17.10% and 14.30% of the total relative a ...
DOI:
10.1007/s10452-007-9153-8

4. The river before damming: distribution and ecological notes on the endemic species Echinogammarus cari (Amphipoda: Gammaridae) in the Dobra River and its tributaries, Croatia

Author:
Žganec, Krešimir; Gottstein, Sanja
Source:
Aquatic ecology 2009 v.43 no.1 pp. 105-115
ISSN:
1386-2588
Subject:
Echinogammarus; Gammarus fossarum; drainage; ecology; indigenous species; mosses and liverworts; physicochemical properties; rivers; streams; water temperature; watersheds; Black Sea; Croatia
Abstract:
... The endemic species Echinogammarus cari (Karaman 1931) is the only species of this genus present in the Black Sea drainage basin of Croatia. The species is known only from its type locality, the Bistrac spring. Since little is known about the distribution and ecology of this amphipod species, research was conducted to determine the extent of its distribution in the Dobra River and its tributaries, ...
DOI:
10.1007/s10452-007-9157-4

5. A measure for assessing functional diversity in ecological communities

Author:
Schmera, Dénes; Erős, Tibor; Podani, János
Source:
Aquatic ecology 2009 v.43 no.1 pp. 157-167
ISSN:
1386-2588
Subject:
dispersions; ecosystems; fish; freshwater; functional diversity; species diversity; twins
Abstract:
... Functional diversity is regarded as a key in understanding the link between ecosystem function and biodiversity, but its measurement is rather problematic. The two widely used continuous measures are the dendrogram-based measure (DBM) and the functional attribute diversity (FAD). In contrast to DBM, FAD does not require the knowledge of the entire species pool before the analysis, and hence FAD is ...
DOI:
10.1007/s10452-007-9152-9

6. Changes in N and P limitation induced by water level fluctuations in Nature Park Kopački Rit (Croatia): nutrient enrichment bioassay

Author:
Peršić, Vesna; Horvatić, Janja; Has-Schön, Elizabeta; Bogut, Ivan
Source:
Aquatic ecology 2009 v.43 no.1 pp. 27-36
ISSN:
1386-2588
Subject:
bioassays; floodplains; habitats; hydrologic factors; lakes; nitrogen; nitrogen content; nutrients; parks; phosphorus; Croatia; Danube River
Abstract:
... The importance of nutrients as limiting factors might vary in environments with different limnological characteristics. In this article we evaluate the effect of frequency and duration of flooding on nutrient limitation in a riparian floodplain. Variations in N and P limitations were studied in the period of low (2003) and high (2004) water level in two different floodplain habitat types in the Na ...
DOI:
10.1007/s10452-007-9156-5

7. Clearance rates of the bdelloid rotifer, Habrotrocha thienemanni, a tree-hole inhabitant

Author:
Devetter, Miloslav
Source:
Aquatic ecology 2009 v.43 no.1 pp. 85-89
ISSN:
1386-2588
Subject:
Rotifera; aquatic communities; bacteria; bacterial communities; body size; bovine serum albumin; coat proteins; foods; habitats; temperature; trophic relationships
Abstract:
... Bdelloid rotifers are basal consumers in aquatic and limnoterrestrial communities that feed primarily on small bacteria. Unfortunately, we know only a little of the role they play in the trophic dynamics in some unusual habitats they inhabit. Habrotrocha thienemanni is a typical example; it is a typical tree-hole inhabitant, commonly achieving dense populations. Filtering rates of H. thienemanni w ...
DOI:
10.1007/s10452-007-9160-9

8. Effects of abiotic factors on the life span of the invasive cordgrass Spartina densiflora and the native Spartina maritima at low salt marshes

Author:
Castillo, Jesús M.; Figueroa, Enrique
Source:
Aquatic ecology 2009 v.43 no.1 pp. 51-60
ISSN:
1386-2588
Subject:
Spartina; flowering; longevity; perennials; plant competition; salt marshes; seeds; survival rate
Abstract:
... We analyzed variations in the life span of the invasive cordgrass Spartina densiflora at low marshes of SW Iberian Peninsula, and identified the abiotic factors limiting the plant in the absence of competition. With these objectives, clump survivorship, flowering, and growth of S. densiflora were studied in two natural populations at different low marsh elevations during more than three years, and ...
DOI:
10.1007/s10452-007-9159-2

9. Effects of different ionic compositions on survival and growth of Physa acuta

Author:
Zalizniak, Liliana; Kefford, Ben J.; Nugegoda, Dayanthi
Source:
Aquatic ecology 2009 v.43 no.1 pp. 145-156
ISSN:
1386-2588
Subject:
Physa; bicarbonates; calcium; chlorides; exoskeleton; freshwater; ions; lethal concentration 50; long term effects; magnesium; potassium; saline water; salinity; salt stress; salt tolerance; seawater; snails; sodium; sulfates; Australia
Abstract:
... Most inland saline waters in southern Australia predominantly contain Na⁺ and Cl⁻ as major ions. The proportions of Ca²⁺, Mg²⁺, SO₄ ²⁻, HCO₃ ⁻ and CO₃ ²⁻ in these waters somewhat vary and might influence salinity tolerance of freshwater organisms. Here the salinity stress of five ionic compositions to the freshwater snail Physa acuta Draparnaud (Gastropoda: Physidae) was compared: commercial sea s ...
DOI:
10.1007/s10452-007-9144-9

10. Effects of pH on salinity tolerance of selected freshwater invertebrates

Author:
Zalizniak, Liliana; Kefford, Ben J.; Nugegoda, Dayanthi
Source:
Aquatic ecology 2009 v.43 no.1 pp. 135-144
ISSN:
1386-2588
Subject:
Hydra; Paramecium; Physa; acidification; aquatic invertebrates; calcium; freshwater; macroinvertebrates; mortality; pH; risk; saline water; salinity; salt tolerance; salts; seawater; sublethal effects
Abstract:
... Salinization of freshwaters often co-occurs with other changes in the environment, including pH. We investigate the effect of pH on salinity tolerance in selected macroinvertebrates (Notalina fulva, Centroptilum sp. and Physa acuta--lethal effects only) and microinvertebrates (Paramecium caudatum and Hydra oligactis--lethal and sublethal effects). Despite seemingly plausible physiological argument ...
DOI:
10.1007/s10452-007-9148-5

11. Effects of water temperature on year-class strengths and growth patterns of pikeperch (Sander lucioperca (L.)) in the brackish Baltic Sea

Author:
Lappalainen, Jyrki; Milardi, Marco; Nyberg, Kari; Venäläinen, Ari
Source:
Aquatic ecology 2009 v.43 no.1 pp. 181-191
ISSN:
1386-2588
Subject:
Sander lucioperca; correlation; covariance; freshwater fish; heat sums; nonlinear models; spring; water temperature; Baltic Sea; Finland
Abstract:
... Pikeperch (Sander lucioperca), the studied species, is the most important amongst freshwater fish species, commercially, in the brackish Baltic Sea. We studied the effects of water temperature on three aspects of pikeperch growth in Haminanlahti bay, Finland. First, annual length increments were related to age and temperature using a non-linear growth model. Since length increments were based on b ...
DOI:
10.1007/s10452-007-9150-y

12. Factors affecting Sciomyzidae (Diptera) across a transect at Skealoghan Turlough (Co. Mayo, Ireland)

Author:
Williams, Christopher D.; Moran, James; Doherty, Owen; Mc Donnell, Rory J.; Gormally, Michael J.; Knutson, Lloyd V.; Vala, Jean-Claude
Source:
Aquatic ecology 2009 v.43 no.1 pp. 117-133
ISSN:
1386-2588
Subject:
Sciomyzidae; autocorrelation; fauna; floods; groundwater; life history; microhabitats; soil pH; soil water; species diversity; summer; surveys; vegetation; vegetation structure; wetlands; winter; Ireland
Abstract:
... Sciomyzid flies, which have potential as bio-indicators, were sampled by sweep-net surveys at a turlough in the west of Ireland. Turloughs are ephemeral wetlands (unique to Ireland), which flood from groundwater in winter and empty in the summer, during that time, they are frequently grazed. The weekly survey consisted of ten linear sweeps (5 m x 1 m) in each of six homogeneous and contiguous vege ...
DOI:
10.1007/s10452-007-9149-4

13. Hydrodynamics-driven plankton community in a shallow lake

Author:
de Souza Cardoso, Luciana; da Motta Marques, David
Source:
Aquatic ecology 2009 v.43 no.1 pp. 73-84
ISSN:
1386-2588
Subject:
environmental factors; hydrodynamics; lakes; plankton; turbidity; Brazil
Abstract:
... Canonical correspondence analysis (CCA) was used to test the hypothesis that the wind-governed hydrodynamics of a shallow coastal lake is responsible for the spatial and temporal gradients of biotic and abiotic variables. Certain environmental variables, such as turbidity, suspended solids, and water level, formed seasonal spatial gradients in Itapeva Lake, southern Brazil, in response to wind act ...
DOI:
10.1007/s10452-007-9151-x

14. Mechanisms of microalgae selection during the assembly of a planktonic community

Author:
Rodrigo, María A.; Rojo, Carmen; Segura, Matilde; Larrosa, José
Source:
Aquatic ecology 2009 v.43 no.1 pp. 61-72
ISSN:
1386-2588
Subject:
viability; microalgae; nutrient content; primary productivity; community structure; uncertainty; Cosmarium; Cryptomonas; Scenedesmus; Planktothrix agardhii; culture media; herbivores; predation; Monoraphidium; Pediastrum; photosynthesis; biomass; Brachionus; Euglena gracilis; Daphnia magna
Abstract:
... We attempt to ascertain the selection mechanisms that affect algal species' abilities to thrive in a given environment, and how the variability of the response is reflected in the community structure (total biomass, diversity) and also in community function (photosynthesis and respiration). For that, we formed algal communities, assembling eight species of freshwater cosmopolite algae with distinc ...
DOI:
10.1007/s10452-007-9143-x

15. Refuge availability and sequence of predators determine the seasonal succession of crustacean zooplankton in a clay-turbid lake

Author:
Horppila, Jukka; Eloranta, Pertti; Liljendahl-Nurminen, Anne; Niemistö, Juha; Pekcan-Hekim, Zeynep
Source:
Aquatic ecology 2009 v.43 no.1 pp. 91-103
ISSN:
1386-2588
Subject:
Chaoborus; Crustacea; dissolved oxygen; fish; invertebrates; lakes; models; oxygen; population growth; predation; predators; spring; summer; turbidity; zooplankton; Finland
Abstract:
... The contribution of predators and abiotic factors to the regulation of the biomass and seasonal succession of crustacean zooplankton was studied in Lake Rehtijärvi (southern Finland). Field data in combination with bioenergetics modeling indicated that invertebrate planktivory by Chaoborus depressed cladoceran populations during early summer. In particular, bosminids that generally form the spring ...
DOI:
10.1007/s10452-007-9158-3

16. Short-term variation in extracellular phosphatase activity: possible limitations for diagnosis of nutrient status in particular algal populations

Author:
Štrojsová, Alena; Vrba, Jaroslav
Source:
Aquatic ecology 2009 v.43 no.1 pp. 19-25
ISSN:
1386-2588
Subject:
Ankyra; Chlorogonium; Monoraphidium; aquatic environment; diurnal activity; diurnal variation; enzyme activity; fluorescence; image analysis; inorganic phosphorus; lakes; physiological state; phytoplankton
Abstract:
... Species-specific extracellular phosphatase activity (PA) was studied in natural phytoplankton with an emphasis on short-term variation in PA and its consequences for the diagnosis of inorganic phosphorus (P) deficiency. Extracellular PA was measured over 3 days at 4-h intervals to compare variations in algal PA in two distinct aquatic environments: in the Římov reservoir and acidified Plešné Lake. ...
DOI:
10.1007/s10452-007-9154-7