Wyniki wyszukiwania - BazTech

1

Low abundance and high patchiness of decapod fauna sampled with van Veen grab on the West African continental margin (Gulf of Guinea, Ghana)

Podwysocki Krzysztof, Pabis Krzysztof, Palero Ferran, Błażewicz Magdalena, Serigstad Bjørn

Oceanologia

|

2024

|

Vol. 66 (2)

220--238

EN

Sixty morphospecies of Decapoda (Malacostraca: Crustacea) representing 34 families were recorded in the material collected in 2012 from 265 van Veen grab (0.1 m2) samples, from the nine transects distributed along the coast of Ghana in the 25–1000 m depth range. The examined material was dominated by the Diogenidae, Panopeidae, Leucosiidae, Pilumnidae and Xanthidae families. Species accumulation curves showed undersampling of the studied area and a large number of the morphospecies comprised singletons and doubletons. Panopeus africanus was the most frequent morphospecies in the analysed material (9.1% of all samples). We observed a substantial decrease of diversity (Shannon Index) and abundance along a depth gradient. Species richness also decreased with depth, starting from the highest number of morphospecies ‒ 38 at 25 m depth, then 33 at 50 m, 17 at 100 m, 11 at 250 m, 8 at 500 m and ending with 1 morphospecies at 1000 m bottom depth. Higher diversity was observed on the continental shelf (25–250 m – 57 morphospecies), while on the slope (500–1000 m) only eight morphospecies were recorded. Numerous factors of natural and anthropogenic origin may affect decapod communities on the coast of Ghana. Since our material was collected using a sampler collecting material at a very small scale, the observed patterns might be affected by the sampling method.

2

Benthic diatoms as valuable indicators of anthropogenic eutrophication in biomonitoring of ribbon lake

Messyasz Beata, Treska Ewa

Ecological Chemistry and Engineering. S

|

2019

|

Vol. 26, nr 4

709--726

EN

In Europe the monitoring of lakes with regard to benthic diatoms is still conducted in line with the European Water Framework Directive. Ribbon lakes are a special case as extremely steep slopes of the lake basin cause their littoral zone to be narrow. The Durowskie ribbon lake was chosen as a model for the assessment of the ecological status of waters based on its Diatom Index. Given its use in recreation, it is under heavy anthropogenic pressure. Physicochemical and biological parameters were monitored in the peak of the vegetational season (July, August) between 2010 and 2018 at 12 varied littoral sites across the full length of the shoreline. This long-term analysis of the Diatom Index, despite showing an improvement in the quality of water, demonstrated the ecological state of Lake Durowskie to be weak (southern, deep part) to moderate (north, shallow part). The taxonomic structure of diatoms (referral and indicator taxa) in phytobenthos communities allowed to show the changes in physicochemical parameters of the environment such as pH, oxygen dissolved in water and its trophic status. Research results are shown in relation to the anthropogenic changes to the lake’s direct catchment area and the results of the physicochemical monitoring of waters.

3

Changes in the benthic fauna composition in the Upper Vistula over the last 50 years : the consequences of the water pollution reduction and alien species invasion

Dumnicka E., Konopacka A., Żurek R.

Oceanological and Hydrobiological Studies

|

2018

|

Vol. 47, No. 3

303--312

EN

The organic pollution of the Upper Vistula waters has been significantly reduced since the mid-20th century. Also salinity has gradually decreased, following an increase observed until the 1990s. Furthermore, the number of alien species has systematically increased. The above-mentioned changes have affected the richness and composition of the benthic fauna. They are particularly remarkable in the river stretch between the town of Oświęcim and the city of Kraków. The improvement of water quality has resulted in the increased number of taxa, mainly those characteristic of moderately polluted water, and the disappearance of taxa typical of strongly polluted or deoxygenated water. Despite the increased salinity level persisting for many years, only three benthic species of brackish waters (Gammarus tigrinus, Paranais frici and P. litoralis) were found in the Upper Vistula. Taxa considered to be euryhaline or halophilous were more numerous. In the 1960s, only one alien species (Physa acuta) was found, but the increased number of non-indigenous species in the last decades is visible, particularly among gammarid crustaceans (Amphipoda, Gammaroidea). The presence of alien species has not caused any visible changes in the species abundance of oligochaetes and mollusks.

4

Benthic Crustacea and Mollusca distribution in Arctic fjord – case study of patterns in Hornsund, Svalbard

Drewnik A., Węsławski J. M., Włodarska-Kowalczuk M.

Oceanologia

|

2017

|

No. 59 (4)

565--575

EN

We present the results of species distribution modeling conducted on macrobenthic occurrence data collected between 2002 and 2014 in Arctic fjord – Hornsund. We focus on species from Mollusca and Crustacea taxa. This study investigates the importance of individual environmental factors for benthic species distribution, with a special emphasis on bottom water temperature. It aims to verify the hypothesis that the distribution of species is controlled by low water temperatures in the fjord and that the inner basins of the fjord serve as potential refugia for Arctic species threatened by the climate change-related intensification of warmer water inflows. Our results confirm the importance of bottom water temperature in regulating the presence of benthic fauna in the Hornsund fjord. The distribution of studied species is clearly related to specific water mass – colder (<1°C) or warmer (>1°C); and the preferred temperature regimes seem to be species specific and unrelated to analyzed groups. This study supports the notion that inner basins of the Hornsund fjord are potential refugia for cold water Arctic fauna, while the outer and central basins provide suitable habitats for fauna that prefer warmer waters.

5

Simplified sampling of benthic macroinvertebrates from small streams

Stastna G., Stransky D., Kabelkova I., Babko R.

Proceedings of ECOpole

|

2016

|

Vol. 10, No. 2

517--522

EN

European Union legislation requires achievement of good ecological status of European streams and rivers. Because of that, the ecological status of all streams has to be assessed and evaluated. If there is a status identified less than good the remedial measures must be applied. For effective remediation it is necessary to find the cause of worse than good status classification. In urbanized areas is a number of urban drainage outlets with consequences in a necessity of very detailed biomonitoring. Due to time and money demands of such detailed monitoring, it is not possible to make standardized macroinvertebrates field sampling and processing to evaluate the ecological status. Therefore, admissible simplification of field sampling of macroinvertebrates compared to the standard AQEM method was searched for. Both the effect of the subjectivity of multihabitat sampling and the effect of the reduction of the number of sampling points and their uncertainties were studied with help of field experimental work and probabilistic Monte Carlo simulations. It was proved, that a substantial reduction of the number of sampling units (from 20 sampling units requested by European protocol AQEM) is possible only for ASPT and saprobity index (7 sampling units is sufficient) and diversity (9 sampling units is sufficient). A certain reduction (to 14 sampling units) is also possible for the number of individuals, % EPT and IBI index but no reduction can be applied in case of number of taxa and BMWP, where already the replicate 20 unit samples were biased by an unacceptable uncertainty.

PL

Normy legislacyjne Unii Europejskiej (Ramowa Dyrektywa Wodna 2000/60/WE) wymagają osiągnięcia dobrego statusu ekologicznego rzek i strumieni na obszarze państw członkowskich. Z tego też powodu status ekologiczny rzek i strumieni krajów Unii powinien być określony i oceniony. W przypadku gdy status ten zostanie oceniony jako mniej niż dobry, powinny zostać podjęte odpowiednie środki zaradcze. Dla wdrożenia efektywnych działań polepszających stan ekologiczny strumieni należy najpierw zidentyfikować powody, dla których jest on niezadowalający. Na terenie obszarów zurbanizowanych zlokalizowanych jest zwykle wiele wylotów z systemów odprowadzających wody opadowe, które powinny być poddane odpowiednim procedurom biomonitoringu. Ze względu na znaczne nakłady finansowe i czasochłonność nie jest możliwe prowadzenie standardowych procedur pobierania i analizy próbek makrofauny bezkręgowej dla każdego z tak licznych punktów wraz z wymaganą oceną statusu ekologicznego. Stąd też poszukiwane są sposoby dopuszczalnego uproszczenia metod pobierania próbek makrobezkręgowców w odniesieniu do standardowych metod AQEM. W ramach przeprowadzonych badań, za pomocą terenowych prac eksperymentalnych oraz symulacji z wykorzystaniem metody Monte Carlo, analizowano efekty subiektywnego próbkowania siedlisk wielogatunkowych oraz zmniejszenia liczby punktów pobierania próbek powiązane z niepewnością próbkowania. Dowiedziono, że znaczne zmniejszenie liczby próbek (z 20 wymaganych w protokole AQEM) jest możliwe tylko dla indeksu ASPT i indeksu saprobowości (wynosi 7 próbek) oraz indeksu różnorodności (wystarczająca liczba 9 próbek). Zauważalne zmniejszenie liczby (do poziomu 14 próbek) jest możliwe również dla ilości osobników oraz % EPT i indeksu IBI. Jednakże niemożliwe jest zmniejszenie liczby próbek w celu prawidłowego określenia liczby taksonów oraz wartości BMWP, gdzie już w przypadku liczby powtórzeń na poziomie 20 próbek wynik obarczony jest wysokim poziomem niepewności.

6

Trace metal concentrations in free-ranger, tube-dweller chironomid larvae and a weakly polluted fluvial sediment

Grzybkowska M., Dukowska M., Michałowicz J., Leszczyńska J.

Oceanological and Hydrobiological Studies

|

2015

|

Vol. 44, No. 4

445--455

EN

The objective of this study was to analyze macroinvertebrate assemblages dominated by Chironomidae (Diptera) and to assess the protective nature of these midges’ larval tubes against trace metals in the weakly polluted Bzura River. This low order lowland river flows through the Łódź City Municipal Area and is supplied by a large amount of organic matter from ecotones and a polluted roadside. Determination of metal content in sediments and chironomid tissue and tubes was conducted using atomic absorption spectroscopy. Our study has shown that the composition of chironomid assemblages was not determined by trace metals but rather by high organic enrichment, which caused the dominance of two species representing the same trophic group − gathering collectors − but differing in behavior. One of them belongs to free-rangers (Prodiamesa olivacea), while the other (Chironomus riparius) to tube-dweller larvae. Although the accumulation of certain trace metals in the tubes was found, the larvae of both types of behavior had a similar concentration of metals in their tissues, which proves effective metal detoxification in these insects.

7

Links between biota and climate-related variables in the Baltic region using Lake Onega as an example

Sharov A. N., Berezina N.A., Nazarova L. E., Poliakova T. N., Chekryzheva T. A.

Oceanologia

|

2014

|

No. 56 (2)

291--306

EN

This paper aims to reveal current changes (recent decades) in regional climatic variables like water temperature (WT), the duration of the ice-free period (ICE-FREE) and the precipitation rate (P), as exemplified by Petrozavodsk Bay (Lake Onega, European Russia), and to analyse their relationships with the global climatic indices NAO, AO and structural characteristics of biota (chlorophyll a concentration (Chl a), phytoplankton and zoobenthos abundance/biomass) in the lake ecosystem, which lies within the Baltic Sea catchment area. Spearman's rank correlations yielded significant (p < 0.05) relationships between the NAO and planktonic Cyanobacteria abundance, and also between NAO, AO, WT, P and the abundance and biomass of zoobenthos. Chl a correlates positively (R = 0.66; p = 0.03) with WT and negatively with ICE-FREE (R = -0.53; p = 0.05). At the same time, multiple regression analysis confirmed that the global climate governs primarily the regional climatic variables and productivity level in the lake's ecosystem, whereas most of the biotic characteristics respond to variability in the regional climate.

8

How lonely they are? A degree of isolation among macrozoobenthos species in the Marine Protected Area, the Bay of Puck, the Southern Baltic

Węsławski J. M., Kryla-Straszewska L., Warzocha J., Urbański J., Włodarska-Kowalczuk M., Kotwicki L.

Oceanological and Hydrobiological Studies

|

2013

|

Vol. 42, No. 3

289--295

EN

Extensive sampling (450 grabs) was performed all over the inner part of Puck Bay (105 km2 area) in summers of 2007–2009. The GIS-based analysis of samples was performed to assess in detail the distribution of 32 benthic species. The minimum area of occurrence was less than 1 km2 for Lekanosphaera rugicauda and the maximum was 83 km2 for Cerastoderma glaucum. The material reveals that species with the pelagic larval stage were most widespread, with the least distance between individuals and the highest average density (e.g. Cerastoderma glaucum, Hydrobia ventrosa). The most isolated and the least dense species within the studied area were discretely mobile, non-larval crustaceans (e.g. Gammarus oceanicus and Lekanosphaera rugicauda), present at single sites with the largest distance from each other. We conclude that analysis of species distribution helps in understanding the threats to populations of marine invertebrates and marine spatial planning, through locating the isolated species and populations.

9

Percid occupation of submersed riverine macrophytes: food resource partitioning between perch (Perca fluviatilis L.) and ruffe (Gymnocephalus cernuus L.)

Dukowska M., Grzybkowska M., Lik J., Jurasz W.

Oceanological and Hydrobiological Studies

|

2012

|

Vol. 41, No. 1

12-23

EN

In a reservoir tailwater of the large, lowland Warta River, perch and ruffe coexist in a macrophyte habitat, which develops as a result of low water discharge in the late spring and summer. At the beginning of each year the diet of both percids, when shorter than 100 mm, is dominated by large, benthic Hydropsyche. Later in the year, epiphytic Chironomidae and Simuliidae replace these trichopterans in the perch diet, and benthic Chironomidae replace them in the ruffe diet. Large cladoceran species then become accessory food items for perch. Consequently, the food niche overlap of these two percids during the research period is only marginal.

10

A Review of Biological Research in the Vistula Lagoon

Paturej E., Gutkowska A., Mierzejewska J.

Oceanological and Hydrobiological Studies

|

2012

|

Vol. 41, No. 4

81-88

EN

The Vistula Lagoon, a brackish water body that offers unique living conditions to aquatic organisms, is an interesting object of hydrobiological investigations. This paper presents a review of biological research conducted on the Vistula Lagoon, from simple floristic and faunistic analyses to satellite-based comprehensive environmental analyses. Changes that occurred in the studied aquatic ecosystem due to human pressure over the last century are discussed. Innovative research technologies determined what measures should be taken to preserve the unique biocenoses in the Vistula Lagoon.

11

Identification of water quality and benthos characteristics in Daya Bay, China, from 2001 to 2004

Wang Y-S., Sun C-C., Lou Z-P., Wang H., Mitchell B.G., Wu M-L., Sun Z-X.

Oceanological and Hydrobiological Studies

|

2011

|

Vol. 40, No.1

82-95

EN

Physicochemical and benthos data were collected from 12 marine monitoring stations in Daya Bay, during 2001-2004. 12 stations in Daya Bay could be grouped into three clusters: cluster I consisted of stations in the southern part of Daya Bay (stations S1, S2 and S6); cluster II consisted of stations in the cage culture areas (stations S3, S4, S5 and S8); cluster III consisted of stations in the southwest, the middle and the northeast of the Bay (stations S7, S9, S10, S11 and S12). Calculation with bivariate correlations between benthos and major physicochemical factors showed that the density of benthos in all stations correlated positively with temperature, DO, pH, NH4-N, SiO3-Si, SiO3-Si /PO4-P and chlorophyll a and was negatively correlated with salinity, Secchi, COD, NO3-N, NO2-N, TIN, PO4-P, TIN/PO4-P and BOD5. Factor analysis showed that there were high positive loading salinity, Secchi and NH4-N of three clusters. Results revealed that temperature, DO, pH, SiO3-Si and SiO3-Si/PO4-P and chlorophyll a could also play an important role in determining the biomass of benthos in Daya Bay, especially near the Nuclear Power Plants, in the southern part and in the cage culture areas.

12

Integracja działań biologicznych i technicznych jako podstaw a intensyfikacji procesów samooczyszczania się zbiorników zaporowych (na przykładzie Zbiornika Sulejowskiego)

Puczyńska I., Skrzypski J.

Ecological Chemistry and Engineering. S

|

2009

|

Vol. 16, nr 2

221-235

PL

Retencjonowanie wód w zbiornikach zaporowych jest podstawowym sposobem poprawy bilansu wody. Obszarem przedstawianych badań był Zbiornik Sulejowski (22 km2, śr. głębokość 3,3 m). Próbki bentosu pobierane były raz w miesiącu (od kwietnia do listopada), wzdłuż zbiornika, na pięciu stanowiskach pomiarowych. Określono ich skład systematyczny, liczebność i biomasę. Dominującymi grupami systematycznymi na każdym stanowisku były larwy muchówek (głównie Chironomidae) oraz larwy skąposzczetów (Oligochaeta). Część rzeczna zbiornika była siedliskiem, gdzie panowały lepsze warunki biotyczne i abiotyczne dla rozwoju bentosu. Fauna denna, akumulując pierwiastki biogenne, może być czynnikiem kształtującym ich szlaki w zbiornikach zaporowych i przyczyniającym się do poprawy jakości wód.

EN

This is assessment of bottom fauna in shallow Sulejów dam reservoir (22 km2, 3.3 m deep). Five main systematic groups were found in each of five site of reservoir. The samples were taken every months (from April to November). The dominant groups were assessed: Diptera larvae (mainly Chironomidae) and subdominant group, Oligochaeta. In general, benthos is richer in terms of number and diversity in fluvial sities. Biotic and abiotic agents have the impact on number and biomass of bottom fauna. Benthos can have role in creating of biogens' trails.

13

Różnorodność biologiczna fauny dennej i jej rola w kształtowaniu szlaków biogenów w Zbiorniku Sulejowskim

Puczyńska I., Skrzypski J.

Proceedings of ECOpole

|

2007

|

Vol. 1, No. 1/2

211--219

PL

Retencjonowanie wód w zbiornikach zaporowych jest podstawowym sposobem poprawy bilansu wody. Obszarem badań był Zbiornik Sulejowski (22 km2, śr. głębokość 3,3 m). Próby bentosowe pobierane były raz w miesiącu (od kwietnia do listopada), wzdłuZ zbiornika, na pięciu stanowiskach pomiarowych. Określono ich skład systematyczny, liczebność i biomasę. Dominującymi grupami systematycznymi na każdym stanowisku były larwy muchówek (głównie Chironomidae) oraz larwy skąposzczetów (Oligochaela). Część rzeczna zbiornika była siedliskiem, gdzie panowały lepsze warunki biotyczne i abiotyczne dla rozwoju bentosu. Fauna denna, akumulując pierwiastki biogenne, może być czynnikiem kształtującym ich szlaki w zbiornikach zaporowych i przyczyniającym się do poprawy jakości wód.

EN

This is assessment of bottom fauna in shallow Sulejów dam reservoir (22 km2, 3.3 m deep). Five main systematic groups were found in each of five site of reservoir. The samples were taken every months (from April to November). The dominant groups were assessed: Diplera larvae (mainly Chironomidae) and subdominant group. Oligochaeta. In general, benthos is richer in terms of number and diversity in fluvial sities. Biotic and abiotic agents have the impact on number and biomass of bottom fauna. Benthos can have role in creating of biogens' trails.

14

Effect of flow manipulations on benthic fauna communities in a lowland river: interhabitat comparison

Dukowska Małgorzata, Szczerkowska Eliza, Grzybkowska Maria, Tszydel Mariusz, Penczak Tadeusz

Polish Journal of Ecology

|

2007

|

Vol. 55, nr 1

101-112

EN

In order to estimate the impact of flow manipulations on abiotic and biotic variables two sites of the fourth-order section of a lowland river (Drzewiczka River, in central Poland) with five dominant habitats each were selected downstream of a dam reservoir: the former just downstream of a canoeing track (CT), marked as disturbed (D), and the latter, control one (C), 10 km farther downstream. At the disturbed site water from the reservoir was released in afternoons to operate the CT (3-5 times higher volume than the natural median, i.e. from 4.3 (most frequently) to over 12.0 m[^-3] s[^-1] (exceptionally), which lasted for 2-3 hours per day while no flow fluctuations were observed in the control. The habitats were sampled over an annual cycle. Variables that have a great impact on macrozobenthos, like current velocity, water depth, substrate composition, presence of macrophytes and standing stock of food resources (BPOM - benthic particulate organic matter, TPOM - transported particulate organic matter, periphyton) were measured. As showed by our results (MANOVA) permanent moderate disturbance caused macrobenthos to be 2-4 times more abundant and diverse at the disturbed site (D), than at nearby natural river site (C), especially at the high-flow area. A lower abundance was recorded at the stagnant and pool habitats of both sites. Chironomidae dominated at all habitats, and Oligochaeta (gathering collectors) at the stagnant and macrophyte habitats; Trichoptera (mainly filtering collectors), Ephemeroptera and Simuliidae (filtering collectors) were the next most abundant among insects, depending on the habitat type. Although Chironomidae dominated at both river sites, they were represented by taxa belonging to various functional feeding groups; at site D chironomids - mainly periphyton scrapers (Orthocladiinae), while at site C - deposit feeders (Chironomini), connected with either silt sediment or sand.

15

Species - area relationships for sandy beach macrobenthos in the context of intertidal width

McLachlan A., Dorvlo A.

Oceanologia

|

2007

|

No. 49 (1)

91-98

EN

The marine species richness (MSR) recorded in 159 sandy beach surveys was analysed in relation to beach width (W). MSR is the number of macrobenthic species collected in a standard intertidal transect survey, excluding insects. Beach width (W) was estimated by dividing the spring tide range [m] by the beach face slope, to give a value in [m]. The relationship between MSR and W was best described by a semilog (exponential) model, which was highly significant: MSR = -5.2 + 10.8 log W. The fit of a power model (MSR = cWz) was also significant. The steep slope of the curve for a power model (z=0.49) suggests that beaches function as isolated rather than contiguous habitats and that the nature of the habitat becomes more benign as beaches widen. There are some latitudinal effects, with tropical beaches displaying a higher species-area relationship for any beach width than other regions.

16

Biological water quality assessment of the Ścinawa Niemodlińska river based on the biotic index method

Czerniawska-Kusza I.

Archiwum Ochrony Środowiska

|

2003

|

Vol. 29, no. 1

39--46

EN

Considering the fact that water quality monitoring programs in Poland are mostly based on physicochemical variables and saprobic systems, it is important to evaluate also the possibility of applying biotic index methods for water quality assessment. The investigation was carried out at the Ścinawa Niemodlińska river (Opole Voivodeship). Benthic macroinvertebrates from seven sampling sites were sampled twice in 1999. Belgian Biotic Index values were calculated on the basis of the results of qualitative and quantitative analyses of the macroinvertebrate community, as the example of the biotic index application. BBI values indicated a low, but different in particular sites, pollution level of the studied ecosystem.

PL

Biorąc pod uwagę fakt, iż programy monitoringu jakości wód w Polsce oparte są w większości na parametrach fizyczno-chemicznych i systemie saprobów, istotnym jest oszacowanie możliwości zastosowania metody indeksu biotycznego w ocenie jakości wód. Badania prowadzono na rzece Ścinawa Niemodlińska (woj. opolskie). Próbki makrobezkręgowców bentosu pobierano z siedmiu stanowisk dwukrotnie w roku 1999: Na podstawie wyników analizy jakościowej i ilościowej zespołu makrobezkręgowców obliczano Belgijski Indeks Biotyczny, jako przykład zastosowania indeksu biotycznego. Wartości BBI wskazywały na niski, lecz zróżnicowany pomiędzy poszczególnymi stanowiskami, poziom zanieczyszczenia badanego akwenu.