Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps)
Background and aims – The host-specificity of epiphytic diatom species has long been debated. Scuba divers sampled epiphytic diatoms in the shallow Alpine Lake Valagola (average depth c. 2 m) along seven transects (length: 30–144 m) in West-East direction. The bottom of the tarn was covered by macro...
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ftunibolognairis:oai:cris.unibo.it:11585/910404 2024-06-23T07:52:05+00:00 Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps) Letakova M. Cantonati M. Hasler P. Nicola A. Poulickova A. Letakova M. Cantonati M. Hasler P. Nicola A. Poulickova A. 2016 ELETTRONICO https://hdl.handle.net/11585/910404 https://doi.org/10.5091/plecevo.2016.1206 https://www.jstor.org/stable/26158591 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000379359100002 volume:149 issue:2 firstpage:144 lastpage:156 numberofpages:13 journal:PLANT ECOLOGY AND EVOLUTION https://hdl.handle.net/11585/910404 doi:10.5091/plecevo.2016.1206 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84978731822 https://www.jstor.org/stable/26158591 Chara aspera Diatom Epiphyton Epiphyton size structure Host specificity Mountain lake Potamogeton gramineus info:eu-repo/semantics/article 2016 ftunibolognairis https://doi.org/10.5091/plecevo.2016.1206 2024-05-27T14:24:49Z Background and aims – The host-specificity of epiphytic diatom species has long been debated. Scuba divers sampled epiphytic diatoms in the shallow Alpine Lake Valagola (average depth c. 2 m) along seven transects (length: 30–144 m) in West-East direction. The bottom of the tarn was covered by macrophytes dominated by Chara aspera and Potamogeton gramineus. Factors affecting epiphytic-diatom spatial distribution at a fine scale were tested. Methods – Dataset was tested using Redundancy Analysis (CANOCO package) and one-way ANOVA (NCSS package). Key results – The analysis separated sampling sites into two groups: the tarn shore dominated by Potamogeton gramineus, and the central area dominated by Chara aspera. Diatom species richness, diversity, and composition differed significantly between the two main host plants. Potamogeton gramineus assemblages were characterized by higher species richness and diversity, and by the large-celled, adnate diatom species Epithemia adnata, Rhopalodia gibba, Eunotia arcus and E. arcubus. Chara aspera was preferred by the small-celled, motile diatom species Brachysira neoexilis and Encyonopsis cesatii. Conclusions – The spatial distribution of epiphytic diatoms in the shallow, oligo-mesotrophic Lake Valagola is influenced by host plant composition and distribution. Epiphyton size structure suggests that Chara represents a less appropriate substrate for long diatoms. Article in Journal/Newspaper Chara aspera IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) Alpine Lake ENVELOPE(-129.182,-129.182,55.529,55.529) Gibba ENVELOPE(6.000,6.000,62.567,62.567) Plant Ecology and Evolution 149 2 144 156 |
institution |
Open Polar |
collection |
IRIS Università degli Studi di Bologna (CRIS - Current Research Information System) |
op_collection_id |
ftunibolognairis |
language |
English |
topic |
Chara aspera Diatom Epiphyton Epiphyton size structure Host specificity Mountain lake Potamogeton gramineus |
spellingShingle |
Chara aspera Diatom Epiphyton Epiphyton size structure Host specificity Mountain lake Potamogeton gramineus Letakova M. Cantonati M. Hasler P. Nicola A. Poulickova A. Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps) |
topic_facet |
Chara aspera Diatom Epiphyton Epiphyton size structure Host specificity Mountain lake Potamogeton gramineus |
description |
Background and aims – The host-specificity of epiphytic diatom species has long been debated. Scuba divers sampled epiphytic diatoms in the shallow Alpine Lake Valagola (average depth c. 2 m) along seven transects (length: 30–144 m) in West-East direction. The bottom of the tarn was covered by macrophytes dominated by Chara aspera and Potamogeton gramineus. Factors affecting epiphytic-diatom spatial distribution at a fine scale were tested. Methods – Dataset was tested using Redundancy Analysis (CANOCO package) and one-way ANOVA (NCSS package). Key results – The analysis separated sampling sites into two groups: the tarn shore dominated by Potamogeton gramineus, and the central area dominated by Chara aspera. Diatom species richness, diversity, and composition differed significantly between the two main host plants. Potamogeton gramineus assemblages were characterized by higher species richness and diversity, and by the large-celled, adnate diatom species Epithemia adnata, Rhopalodia gibba, Eunotia arcus and E. arcubus. Chara aspera was preferred by the small-celled, motile diatom species Brachysira neoexilis and Encyonopsis cesatii. Conclusions – The spatial distribution of epiphytic diatoms in the shallow, oligo-mesotrophic Lake Valagola is influenced by host plant composition and distribution. Epiphyton size structure suggests that Chara represents a less appropriate substrate for long diatoms. |
author2 |
Letakova M. Cantonati M. Hasler P. Nicola A. Poulickova A. |
format |
Article in Journal/Newspaper |
author |
Letakova M. Cantonati M. Hasler P. Nicola A. Poulickova A. |
author_facet |
Letakova M. Cantonati M. Hasler P. Nicola A. Poulickova A. |
author_sort |
Letakova M. |
title |
Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps) |
title_short |
Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps) |
title_full |
Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps) |
title_fullStr |
Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps) |
title_full_unstemmed |
Substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the Brenta Dolomites (South-eastern Alps) |
title_sort |
substrate specificity and fine-scale distribution of epiphytic diatoms in a shallow tarn in the brenta dolomites (south-eastern alps) |
publishDate |
2016 |
url |
https://hdl.handle.net/11585/910404 https://doi.org/10.5091/plecevo.2016.1206 https://www.jstor.org/stable/26158591 |
long_lat |
ENVELOPE(-129.182,-129.182,55.529,55.529) ENVELOPE(6.000,6.000,62.567,62.567) |
geographic |
Alpine Lake Gibba |
geographic_facet |
Alpine Lake Gibba |
genre |
Chara aspera |
genre_facet |
Chara aspera |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000379359100002 volume:149 issue:2 firstpage:144 lastpage:156 numberofpages:13 journal:PLANT ECOLOGY AND EVOLUTION https://hdl.handle.net/11585/910404 doi:10.5091/plecevo.2016.1206 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84978731822 https://www.jstor.org/stable/26158591 |
op_doi |
https://doi.org/10.5091/plecevo.2016.1206 |
container_title |
Plant Ecology and Evolution |
container_volume |
149 |
container_issue |
2 |
container_start_page |
144 |
op_container_end_page |
156 |
_version_ |
1802643299254665216 |