Assessing Habitat Suitability for the Common Pochard, <i>Aythya Ferina</i> (Anseriformes, Anatidae) at different Spatial Scales in Orel’ River Valley, Ukraine

Пономаренко, О. Л.; Баник, М. В.; Жуков, О. В.

doi:10.2478/eko-2021-0018

Cited by 6 publications

(7 citation statements)

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“…It should also be noted that, with a certain degree of conditionality, phytoindication estimates can be converted into absolute physical units, which quantitatively characterize environmental factors (Didukh, 2011). Habitat assessments based on the phytoindication method are used to quantitatively characterize the ecological niche of animals (Zimaroeva et al, 2016;Yorkina et al, 2018;Zhukov et al, 2019;Ponomarenko et al, 2021).…”

Section: Figmentioning

confidence: 99%

“…The ecological niche theory is an effective generalization for describing the habitat preference of animal species (Hirzel et al, 2002;Hirzel & Le Lay, 2008;Zimaroeva et al, 2016;Ponomarenko et al, 2021). An important problem is the consideration of environmental parameters that can indicate the ecological niche of animals (Kunakh et al, 2018;Zhukov et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Phytoindication approach to assessing factors determining the habitat preferences of red deer (Cervus elaphus)

2021

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The study examined the possibility of using the phytoindication technique to describe habitat preferences of red deer in a relatively homogeneous area. Two alternative hypotheses were tested. Hypothesis 1 suggests that the relationship between red deer and vegetation is due to a trophic factor, so preferences for individual plant species cause vegetation to influence the distribution of animal numbers. Hypothesis 2 suggests that environmental factors influence vegetation, structuring and determining the productive level of the community as a whole. Therefore, environmental factors, rather than individual plant species, cause vegetation-animal interactions. The research was conducted on Biryuchiy Island Spit, where the Azov-Sivash National Nature Park is located. The geobotanical surveys were performed in three types of ecosystems: sandy steppe (vegetation class Festucetea vaginatae), saline meadows (vegetation class Festuco–Puccinellietea), and artificial forest plantation (vegetation class Robinietea). 250 releves were recorded according to the Brown-Blanquet approach. The number of fecal pellets and the number of groups of pellets of red deer was recorded together with geobotanical surveys in the same sample plots. The pellet groups counted in the field were converted to deer densities in specific vegetation classes taking into account the number of pellet groups on the site and the decay rate of the fecal pellets. The vegetation types were distinguished by the number of deer fecal pellets per unit area. The highest number of fecal pellets was found for the plant class Festucetea vaginatae, somewhat fewer fecal pellets were in the plant class Robinietea, and the lowest number was in the plant class Festuco-Puccinellietea. A geometric distribution model is adequate for explaining the experimental data on the number of fecal pellets. A total of 59 species of flowering plants were found. Based on the species composition and projective cover of species, the ecological regimes of ecotopes were identified by phytoindication. The correspondence analysis of the vegetation revealed two ordination axes. The ordination axis 1 (CA1) was able to explain 11.3% of community inertia, and the ordination axis 2 (CA2) was able to explain 5.2% of community inertia. The maximum excretory activity of animals was recorded for the central part of the ordination space, indicating the presence of an optimum zone in the gradient of environmental factors that structure plant communities. The forward selection procedure allowed the Nutrients Availability variable to be selected as the most important variable to explain variation in the plant community structure. The number of deer fecal pellets exhibited different patterns of response in the Nutrients Availability gradient. The response within the plant class Festucetea vaginatae could best be explained by Model III from the list of HOF-models. The response of the excretory activity of deer within the class Festuco-Puccinellietea could best be fitted by the model IV, which represents a symmetric Gaussian curve. The response of excretory activity in the Robinietea vegetation class was asymmetrical bimodal. The ecological properties of the red deer ecological niche in both the drier and less mineralized part of the range of ecological conditions and the wetter and more mineralized part should be assessed in the context of the prospects for future studies.

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Section: Figmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Phytoindication approach to assessing factors determining the habitat preferences of red deer (Cervus elaphus)

2021

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“…The Dnipro-Zaporizhzhya-Kryvyi Rih triangle was recognized as a territory heavily affected by pollutants generated by many activities, including heavy industry, oil refining, metallurgy, petrochemistry, mining and energy (Vasenko, 1998). Much of the territory of the reserve is occupied by wetland habitats, which are formed in the floodplain of the Dnipro River (Ponomarenko et al, 2021). Despite the proximity of industrial centers and high level of impact of agroindustrial complexes, the Reserve's territory performs an important environmental function and is an oasis of land and water biota biodiversity.…”

Section: Introductionmentioning

confidence: 99%

Application of remote sensing data for monitoring eutrophication of floodplain water bodies

Fedonenko

Kunakh²,

Chubchenko³

et al. 2022

Biosys. divers.

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The aim of this article was to investigate the influence of structural features of the floodplain water network on the spatial and temporal dynamics of chlorophyll-a concentration as an indicator of eutrophication. The research was conducted in the waters of the “Dnipro-Orilskiy” Nature Reserve. The geographic information base with polygonal objects which represented water bodies of the reserve was created on the basis of detailed geographical maps and the high resolution space images. The water bodies were characterized using such parameters as the distance of the water body centroid from the nearest shore of the Dnipro River, the area of the water body, the order of the water body and the connectivity of the water body. Chlorophyll-а concentration was estimated based on the surface algal bloom index. The information was obtained about 148 water bodies, 141 of which are water bodies in the floodplain of the Dnipro River. The area of floodplain water bodies within the reserve was 3.28 million m2. The area of floodplain water bodies ranged from 300–232,500 m2. Trophic State Index allows us to estimate the trophic level of Dnipro River waters as mesotrophic, water bodies of first and second order as eutrophic, and water bodies of third and fourth order as hypereutrophic. The dynamics of chlorophyll-a content in water followed the seasonal course of temperatures. The concentration was lowest in the cold period of the year and reached its maximum in the second half of summer. The autumn decrease occurred at the end of September. The seasonal course of air temperature was superimposed on the peculiarities of the temperature regime of a particular water body, which depended on its depth and flow rate. The time, water body area, distance from the Dnipro River channel, connectivity and order of water bodies were the statistically significant predictors of chlorophyll concentration in water and were able to explain 85% of the variation of this indicator. The increase in chlorophyll-a concentration with increasing order of a water body is due to a decrease in the intensity of water exchange and a decrease in the depth of water bodies of higher order. An increase in the order of a water body is accompanied by a branching network of water bodies, the ability of water bodies to clear sediments decreases. Sediment accumulation leads to a decrease in their depth. Warming of shallow ponds and accumulation of organic matter in them are factors of intensive growth of blue-green algae. The evacuation of surplus organic matter, which results from mass vegetation development with excessive nutrient inputs, is a key driver of the eutrophic regime of water bodies. The increasing importance of regulatory processes develops in agreement with an increase in chlorophyll-a concentration in a water body. The importance of the considered factors reaches the highest level in summer time, when simultaneous maximum warming of water bodies and minimum water level in them take place. Accordingly, the differences between deep and relatively cool water bodies and shallow water bodies that warm up quickly, which significantly stimulates the growth of organic mass, reach the greatest contrast. The spatial patterns of variation in chlorophyll-a concentration have a complex multiscale structure, indicating the multiple nature of the acting factors. The spatial variability was represented as a composition of broad-scale and medium-scale spatial processes. The broad-scale process is most dependent on connectivity, whereas for the medium-scale process the leading one is the effect of water body order.

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“…The depressed state of the reservoir has become as a consequence of the mass multiplication of microalgae of cyanobacteria Nodularia spumigena, dinophyte alga Lingulodinium polyedra and Centric diatoms called "water blooms" and decreased water transparency [2][3][4]. The process of "water blooms" was the result of intensive anthropogenic impact through nutrient inputs, radioactive and chemical contamination of water, dumping, and sand mining in the sea [5][6][7][8]. The long-term suppression led to the death of most 1049 (2022) 012059 IOP Publishing doi:10.1088/1755-1315/1049/1/012059 2 marine organisms [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Morphological response of lagoon cockle Cerastoderma glaucum (Poiret, 1789) to eutrophication in the Sea of Azov

Mirzoeva

Demchenko

2022

IOP Conf. Ser.: Earth Environ. Sci.

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The bivalve species Cerastoderma glaucum (Poiret, 1789) was studied in this study. This species is allochthonous and belongs to the Mediterranean zoogeographic complex and was introduced in the Holocene. The C. glaucum is the dominant species among the bivalves in the Sea of Azov and has a wide range of distribution. The species is distributed in the coastal zone within 100-300 m from the shore, and it is also found in desalinated water bodies such as estuaries. The C. glaucum is fairly resistant to hypoxia. It is euryhaline with respect to salinity and eurybiontic with respect to soil. The species can settle on sandy, muddy or sandy-silty substrate. The aim of the study was to investigate the morphology of shells of this species in order to find out the reasons of morphological features change of Cerastoderma glaucum in different biotopes of the Sea of Azov. The study was conducted in early June 2021 on the northwestern coast of the Azov Sea. A total of 20 stations were investigated. Cerastoderma glaucum was found at all stations. The morphological variability of the bivalve Cerastoderma glaucum was investigated using the method of discriminant analysis. A notable morphological feature was the external alteration of the mollusc shell. A displacement of the apex to the anterior edge of the shell, lengthening of the posterior edge, and deformation of the shell shape, indicating the ecological characteristics of the study area and its inhabitants. Also, there is a difference in the ratio of shell height to shell length, indicating an increased level of siltation in the ground. Shell thickness varies in all survey areas, indicating different levels of salinity. The overall abundance of molluscs from the different biotopes indicates the factors determining the shape of cockle shells. In turn, morphological parameters indicate the general condition of the Sea of Azov. So, it can be assumed that siltation of the substrate on which benthic communities are located has increased as a consequence of massive deposition of phytoorganic residues. In addition, the hydrolytic regime has changed as a result of anthropogenic factors. As a consequence, salinity, oxygen levels are changing, etc.

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Assessing Habitat Suitability for the Common Pochard, Aythya Ferina (Anseriformes, Anatidae) at different Spatial Scales in Orel’ River Valley, Ukraine

Cited by 6 publications

References 42 publications

Phytoindication approach to assessing factors determining the habitat preferences of red deer (Cervus elaphus)

Phytoindication approach to assessing factors determining the habitat preferences of red deer (Cervus elaphus)

Application of remote sensing data for monitoring eutrophication of floodplain water bodies

Morphological response of lagoon cockle Cerastoderma glaucum (Poiret, 1789) to eutrophication in the Sea of Azov

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