2021. május 11., kedd


 

Az örökzöld..

Megjelent egy klasszikus témájú cikkünk a Biologia folyóiratban. Mely hazánkban ritkábban előforduló mikroszkópikus méretű fajok elterjedését mutatja be, összehasonlítva azokat a nemzetközi referenciákkal. A cikk nagy előnye, hogy segítséget nyújt a szakembereknek a hasonló fajok különbségeinek a bemutatásával. A cikkünk innen ingyenesen elérhető: https://doi.org/10.1007/s11756-021-00750-9

Enikő, T., & Viktória, B. (2021). Rarely mentioned species in Hungary: Can we step into the same lake?. Biologia, 1-13.

 Abstract

 Fig. 2

International and national protection strategies and directives focus mainly on macroscopic organism and attempt to maintain their endangered habitats. However, microscopic communities are also threatened by decreasing biodiversity and many species including freshwater algae can disappear without even knowing they were present in the habitat. Defining rarity of microscopic taxa is not easy. The species’ rarity is based on detailed knowledge of distribution and abundance of species. But only limited information is available about rare algal species especially in a given ecoregion. Reducing the data gaps, here, we present altogether 20 phytoplankton taxa rare in Hungary: three species of Chlorophyceae, eight species of Trebouxiophyceae, two taxa of Euglenophyceae, one-one species of Cyanobacteria, Bacillariophyceae and Mediophyceae and three species of Xanthophyceae. One of them, the Cylindrotheca gracilis is on the Hungarian Red List. Physical and ecological characteristics of standing waters where these species were found as well as their former occurrence all over the world are also reviewed.


 

Megjelent B-Béres Viktória elsőszerzőségével legújabb cikkünk az Ecological Indicators szakfolyóiratban (B-Béres, V.,  Stenger-Kovács, Cs., Török P., T-Krasznai, E. (2021): Are recent protection strategies sufficient for maintaining diverse freshwater benthic diatom assemblages? Ecological Indicators 127). A cikk elérhető innen: https://doi.org/10.1016/j.ecolind.2021.107782. A cikk összefoglalója az alábbiakban olvasható.

Abstract

Even though microscopic algae play pivotal role in the healthy functioning of freshwater ecosystems, recent water protection strategies rarely consider them and primarily focus on macroscopic organisms. Here, we studied the effect of protection level and utilization type of lowland standing waters on the composition and diversity of benthic diatom assemblages and on the diatom-based ecological status of waters. We hypothesized that (i) protected waters will sustain more diverse diatom assemblages and better ecological quality than not protected ones. We also hypothesized that (ii) the increase in number of utilization will affect negatively on biodiversity and on ecological quality. Clear taxonomic differences were revealed only in protected and not utilized waters while trait composition in protected waters was independent from the utilization type. Neither biodiversity nor ecological status of waters were influenced by protection level. The increase in number of utilization types, however, significantly decreased functional richness. Although high biodiversity of algae can effectively buffer the negative effects of climate change and anthropogenic impact, recent protection strategies are insufficient to support it.