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Author Correction: The influence of active metabolites from the decomposition of camelina and barley straw on the development of phytoplankton from eutrophic freshwater ecosystem
Shifts in phytoplankton communities in response to water parameters and large branchiopod filter feeders in kettle hole ponds of farmland landscape
Abstract Temporary ponds in agricultural landscapes, highly vulnerable to anthropogenic pressure and climatic variation, constitute unique habitats for microalgae and endangered filter feeders (large branchiopods). Such ponds play a crucial role in the functioning of farmland ecosystem, yet they remain largely understudied. Our study is the first to examine changes in phytoplankton communities in temporary kettle hole ponds in relation to rapid shifts in biotic (large branchiopods) and physical and chemical parameters of water. We conducted our research over a three-year cycle (in nine ponds in western Poland), with sampling starting in spring when inundation usually occurs, and continuing until the ponds dried out. Among 406 phytoplankton taxa (mainly euglenoids, but also diatoms and chlorophytes), locally rare species (e.g. Desmatractum indutum) were noted. When branchiopods occurred in the ponds, the phytoplankton communities shifted towards unicellular chlorophytes. Furthermore, nitrogen forms, temperature, conductivity, and pH were the abiotic factors altering the studied communities. Surprisingly, the diversity of phytoplankton species did not decrease with increasing temperature, which is inconsistent with the trend observed in permanent water bodies. The study identified specific drivers of phytoplankton community structure and dynamics, underscoring their ecological significance and management implications. These insights will be valuable for future conservation strategies of temporary ponds, crucial in sustaining biodiversity in farmland areas.
Struktura zbiorowisk fitoplanktonu w wybranych zbiornikach wodnych dawnych użytków ekologicznych „Kopanina I” i „Kopanina II” w Poznaniu
Nowe stanowiska roślin naczyniowych Polski, 6
W pracy przedstawiono nowe stanowiska 25 rzadkich (lub regionalnie rzadkich) roślin naczyniowych w Polsce, tj. Allium angulosum, Asclepias syriaca, Bromus sterilis, Carex davalliana, Claytonia perfoliata, Dactylorhiza incarnata subsp. incarnata, Erechtites hieraciifolius, Euthamia graminifolia (Solidago graminifolia), Festuca myuros (Vulpia myuros), Gentiana cruciata, Gentiana pneumonanthe, Gypsophila paniculata, Lithospermum officinale, Najas marina, Pilosella aurantiaca (Hieracium aurantiacum), Pistia stratiotes, Scutellaria altissima, Senecio inaequidens, Silene coronaria (Lychnis coronaria), Stachys annua, Stellaria pallida, Typha shuttleworthii, Valeriana locusta (Valerianella locusta), Xanthium orientale (Xanthium albinum) oraz Zannichellia palustris.
The influence of active metabolites from the decomposition of camelina and barley straw on the development of phytoplankton from eutrophic freshwater ecosystem
Sukcesja wtórna fitoplanktonu w okresowych zbiornikach wodnych: wpływ temperatury i fotoperiodu na strukturę zbiorowisk
Small water bodies in agricultural areas as important habitats for euglenoids in Poland
Temporary water bodies of glacial origin, known as kettle holes, are typical elements of the young moraine landscape in many countries. Unfortunately, they are very exposed to effects of anthropogenic changes, especially in agricultural areas. Due to their small area and depth, as well as to the great fluctuations in water level, they create specific conditions for organisms that inhabit them. Consequently, kettle holes are unique biodiversity hotspots in landscape, rich in some microalgal species, particularly euglenoids (euglenophytes). In this study, the taxonomic composition of euglenoids was studied in three temporary water bodies in an agricultural landscape of Wielkopolska Province (western Poland). In total, 65 euglenoid taxa were identified there during one year. Euglenoids in the investigated field ponds were the most species-rich group of microalgae. They accounted for 26% of the total number of phytoplankton taxa. According to the constancy (frequency) of occurrence most of the species were incidental. The most common taxa were: Trachelomonas volvocina, Euglenaformis proxima, Trachelomonas intermedia, Lepocinclis tripteris, and Lepocinclis acus. The high species richness of euglenoids in aquatic ecosystems of agricultural areas shows how valuable ponds are for preserving local biodiversity and for aquatic food webs. The small water bodies in farmlands should be protected against progressive anthropogenic eutrophication and degradation.
Chlorophytes response to habitat complexity and human disturbance in the catchment of small and shallow aquatic systems
AbstractHuman-originated transformation in the catchment area may be reflected in the water quality and ecological state of the aquatic environment. Chlorophytes, the most common and diverse group of microalgae, may be a valuable tool for studies of small water bodies, ecosystems poorly recognized but extremely sensitive to the climate changes. Here we investigated the response of the chlorophytes to abiotic and biotic factors in different habitats and ponds’ catchments. Chlorophytes demonstrated a prevalence towards a specific type of catchment area. Field ponds supported chlorophytes typical for nutrient-rich/high-organic and shallow well-mixed waters. Forest ponds supported high chlorophyte diversity. A high importance of desmids, tolerant to light deficiency, confirms their preferences towards lower pH and lower trophic state in the forest ponds. Habitat type strongly impacted the distribution of chlorophytes. Great abundance and fertile-water species were associated with the open water, whereas aquatic plants hosted relatively low chlorophyte abundance which is a derivate of the filtrators grazing as well as the nutrient uptake and shadowing by macrophytes. Macrophyte-dominated zones created favorable conditions for some periphytic desmids and filamentous chlorophytes, species preferring lower trophic state and co-occurring with zooplankton. We assume that cosmopolitan chlorophytes can be adapted for determination of the ecological value of small water bodies, including the level of habitat heterogeneity. But chlorophytes clearly react to the level of human impact in the ponds’ catchment, both specific species and functional groups. Thus, we recommend them, particularly desmids, for water quality state assessment in ponds.
Nowe stanowiska roślin naczyniowych Polski, 5
W pracy przedstawiono nowe stanowiska 18 rzadkich (lub regionalnie rzadkich) roślin naczyniowych w Polsce, tj. <i>Abutilon theophrasti, Aquilegia vulgaris, Carex bohemica, C. tomentosa, Crocus speciosus, Erechtites hieraciifolia, Lathyrus nissolia, Lunaria annua subsp. annua, Lycopodiella inundata, Myricaria germanica, Nymphaea candida, Ophioglossum vulgatum, Potentilla indica, Pulicaria dysenterica, Rubus kaznowskii, Scilla sardensis, Solidago ×niederederi</i> oraz <i>Veratrum lobelianum</i>.