<abstract xmlns="http://www.w3.org/1999/xhtml">

<italic>Nitzschia taikiensis</italic> sp. nov. is a brackish diatom species found in the Toberi River marsh, eastern Hokkaido, Japan. This species has characteristics similar to <italic>Nitzschia subamphioxoides</italic> Hustedt, which was originally described by Hustedt in 1959. In the present study, we conducted a comparative morphological analysis of <italic>N. taikiensis</italic> and <italic>N. subamphioxoides</italic>. The obtained results showed that they are different species. Sampling sites of <italic>N. taikiensis</italic> were located in salt marsh environments with very low salinity (1-5‰), acidic pH (5.2-5.9) and high mud content (95.0-97.5%). Identification of this species was relatively easy based on LM and SEM image analysis of its frustule features, such as the external form and stria density. This species has not been previously reported in Japan, which could be attributed to the reduction or loss of Japanese freshwater and salt marsh environments in the coastal areas, resulting from urban and industrial development.
</abstract>

<italic>Nitzschia taikiensis</italic> sp. nov. (Bacillariophyta) – a new brackish diatom from the Toberi River marsh in the eastern Hokkaido, Japan

<abstract xmlns="http://www.w3.org/1999/xhtml">

This paper presents a study on the distribution of hawthorns and wild roses of the Middle Noteć River Valley region in north-west (NW) Poland. The main purpose of the study was to provide a full list of wild <italic>Crataegus</italic> and <italic>Rosa</italic> taxa growing in the examined area. Field studies (2016-2017) and formerly published data, made it possible to recognize 10 taxa (including one rose hybrid within the rank of species). Four new taxa were found in the explored area during studies. These were: <italic>Crataegus rhipidophylla</italic> Gand., <italic>C</italic>. ×<italic>macrocarpa</italic> Hegetschw., <italic>C</italic>. ×<italic>subsphaericea</italic> Gand. and <italic>Rosa</italic> ×<italic>subcanina</italic> (H. Christ) Vuk.
</abstract>

Department of Biological Sciences, Faculty of Physical Culture in Gorzów Wlkp.

Wild <italic>Rosa</italic> L. and <italic>Crataegus</italic> L. taxa of the Middle Noteć River Valley (NW Poland)

<abstract xmlns="http://www.w3.org/1999/xhtml">

This study aims to predict the impact of bioclimatic variables in current and future climatic scenarios on the distribution of <italic>Inuleae</italic> tribe species. Modeling the distribution of 30 species of the <italic>Inuleae</italic> tribe in Algeria was carried out with a maximum entropy model. Two models with 99 occurrence points were obtained with mean values of Area Under a Curve (AUC) of 0.987±0.01 and 0.971±0.02, reflecting excellent predictive power. Three bioclimatic variables contributed mainly to the first model and four - to the second one with cumulative contributions of 83.8% and 79%, respectively elucidating differences between species of the two major climatic zones in Algeria: the Tell and the Sahara. Two-dimensional niches of Algerian <italic>Inuleae</italic> species allowed to distinguish these two groups with the distribution of 18 Tell species, characterized by high rainfall (14-18°C, 400-1000 mm) and the other 12 species – distributed in hot and dry environments (17-24°C, 20-200 mm). Modeling the distribution under future conditions showed that habitats of the Saharan region would be much less suitable for these species with a variation in the annual mean temperature increase up to 20% and a decrease in annual precipitation, which could raise to 11 and 15%.
</abstract>

Algerian <italic>Inuleae</italic> tribe species distribution modeling underinfluence of current and future climate conditions

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Biodiversity Research and Conservation

 An international quarterly, the Biodiversity: Research and Conservation (Biodiv. Res. Conserv.) publishes original papers, short notes and reviews in fields of plant, fungi and lichens taxonomy, chorology, ecology and nature conservation. Preferences are given to works concerning contemporary transformations of biodiversity. Why subscribe and read  source of high quality research, with main focus on Central and Eastern Europe but open to authors from all over the world,  peer-reviewed by international experts,  addresses a wide range of issues on plant taxonomy, ecology, chorology, biogeography and conservation with particular emphasis on contemporary changes to biodiversity, both in natural, semi-natural and man-made environment,  high level of editorial quality,  available in print and electronic format,  free of charge access.   Why submit   peer-reviewed by international experts,  constructive and helpful editorial guidance,  thorough language revision,  high level of editorial quality and color printing,  open both to established and young authors.   Rejection Rate   About 10%   Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 

Biodiversity Research and Conservation

Volume 57 (2020): Issue 1 (March 2020)

Nitzschia taikiensis sp. nov. (Bacillariophyta) – a new brackish diatom from the Toberi River marsh in the eastern Hokkaido, Japan

Wild Rosa L. and Crataegus L. taxa of the Middle Noteć River Valley (NW Poland)

Algerian Inuleae tribe species distribution modeling underinfluence of current and future climate conditions

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