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Article: Diatom diversity and distribution in Madeira Island streams (Portugal).

Ritter, Catarina / Raposeiro, Pedro M / Gonçalves, Vítor

2020 Volume 8, Page(s) e59813

Abstract: Background: Here, we present the data obtained from the samples collected in a field campaign during the spring of 2015 which aims for a better understanding of the diversity and distribution patterns of freshwater diatoms in Madeira Island. Following ... ...

Abstract	Background: Here, we present the data obtained from the samples collected in a field campaign during the spring of 2015 which aims for a better understanding of the diversity and distribution patterns of freshwater diatoms in Madeira Island. Following European and Portuguese standards and recommendations for routine diatom sampling and analysis, we collected samples in 40 sites, distributed in 27 permanent streams and identified the diatom species present, using general diatom floras and studies in Portuguese freshwater diatoms. New information: Little is known about the diversity and distribution of freshwater diatom assemblages from Madeira Archipelago. This study reports a survey in 40 sites in Madeira Island distributed in 27 permanent streams. A total of 965 diatom (Bacillariophyta) occurrences were recorded, belonging to 130 different taxa from 44 genera and 27 families. The families with the highest number of occurrences were Bacillariaceae (176), Achnanthidiaceae (135) and Naviculaceae (133). The two diatom endemisms, described previously in Madeira Island (Lange-Bertalot 1993),
Language	English
Publishing date	2020-12-16
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2736709-5
ISSN	1314-2828
ISSN	1314-2828
DOI	10.3897/BDJ.8.e59813
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Distribution of testate amoebae in bryophyte communities in São Miguel Island (Azores Archipelago).

Souto, Martin Souto / Gonçalves, Vítor / Pontevedra-Pombal, Xabier / Raposeiro, Pedro M

Biodiversity data journal

2021 Volume 9, Page(s) e63290

Abstract: Background: Testate amoebae are a polyphyletic group of protists living preferentially in soils, freshwaters and wetlands. These Protozoa have a worldwide distribution, but their presence and diversity in the Azores (a remote oceanic archipelago) is ... ...

Abstract	Background: Testate amoebae are a polyphyletic group of protists living preferentially in soils, freshwaters and wetlands. These Protozoa have a worldwide distribution, but their presence and diversity in the Azores (a remote oceanic archipelago) is poorly known, with only twelve taxa recorded so far. The published information reflects occasional collections from sporadic field visits from naturalists to São Miguel Island, mainly in the nineteenth century. To overcome this limitation, a standardised survey was carried out on the Island, sampling different types of habitats from several localities to provide the distribution and information on species ecology of testate amoebae. New information: In this study, 43 species of testate amoebae were recorded (within a total of 499 occurrences), belonging to two orders of Protista (26 Arcellinida and 17 Euglyphida). The most frequently occurring testate amoebae were
Language	English
Publishing date	2021-03-17
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2736709-5
ISSN	1314-2828
ISSN	1314-2828
DOI	10.3897/BDJ.9.e63290
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Article: Aquatic macroinvertebrates in Madeira Island (Portugal) streams: diversity and distribution.

Raposeiro, Pedro M / Balibrea, Ana / Riva, Julie-Camile / Ritter, Catarina Johanna Fernandes Rodrigues / Gonçalves, Vítor

Biodiversity data journal

2022 Volume 10, Page(s) e73909

Abstract: Background: The Madeira Island (Portugal; 32°24'-33°07'N, 16°16-17°16'W; 796 km: New information: The results of the present study revealed 713 occurrences in 40 sampling points in Madeira Island streams. The occurrence data showed 70 different ... ...

Abstract	Background: The Madeira Island (Portugal; 32°24'-33°07'N, 16°16-17°16'W; 796 km New information: The results of the present study revealed 713 occurrences in 40 sampling points in Madeira Island streams. The occurrence data showed 70 different aquatic taxa belonging to 21 orders and 53 families. Amongst our occurrence data, 15 endemic taxa (22.1%) from Madeira Archipelago were found. In addition, different families of Collembola and different taxa of Copepoda (Onychiuridae, Poduridae, Isotomidae, Entomobryidae, Sminthuridae) comprised new records for the Madeira streams. Therefore, further taxonomic and ecological studies on freshwater invertebrates from Madeira Island should be done with a particular focus on these lesser-known groups. Thus, our data increase the geographical data distribution of freshwater macroinvertebrates and their diversity in Madeira Island. This database is an update of geographical information of diversity distribution of Madeira freshwater macroinvertebrates known groups. This information is essential for a better understanding of community composition, diversity, occurrence or spatial distribution, which will help explore different research questions on different research areas, such as community ecology and biogeography.
Language	English
Publishing date	2022-02-18
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2736709-5
ISSN	1314-2828
ISSN	1314-2828
DOI	10.3897/BDJ.10.e73909
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Article: Aquatic macroinvertebrates in Madeira Island (Portugal) streams: diversity and distribution

Raposeiro, Pedro M. / Balibrea, Ana / Riva, Julie-Camile / Ritter, Catarina Johanna Fernandes Rodrigues / Gonçalves, Vítor

Biodiversity data journal. 2022 Feb. 18, v. 10

2022

Abstract: The Madeira Island (Portugal; 32°24’–33°07’N, 16°16–17°16’W; 796 km²) is an oceanic island located in the North Atlantic, about 980 km south of Portugal and about 700 km west of the African coast. The presence of freshwater invertebrates in oceanic ... ...

Abstract	The Madeira Island (Portugal; 32°24’–33°07’N, 16°16–17°16’W; 796 km²) is an oceanic island located in the North Atlantic, about 980 km south of Portugal and about 700 km west of the African coast. The presence of freshwater invertebrates in oceanic islands has always raised questions concerning dispersal, colonisation and evolution. Therefore, the freshwater fauna of Madeira Island has attracted the interest of many researchers in the past, the first publications going back to the nineteenth century. Initial studies were mainly taxonomic, resulting in a checklist of the Madeira freshwater macroinvertebrates with 240 taxa. As typical from oceanic islands, freshwater invertebrates are characterised by low diversity, with some taxonomic groups absent. Although freshwater Madeiran macroinvertebrates are a well-studied group, geographical information of diversity distribution is still scarce. Therefore, more studies are needed, especially georeferenced data of diversity and distribution of macroinvertebrate assemblages, to provide valuable information for improving knowledge and the development of typologically appropriate monitoring and conservation programmes and restoration strategies for local stakeholders. The results of the present study revealed 713 occurrences in 40 sampling points in Madeira Island streams. The occurrence data showed 70 different aquatic taxa belonging to 21 orders and 53 families. Amongst our occurrence data, 15 endemic taxa (22.1%) from Madeira Archipelago were found. In addition, different families of Collembola and different taxa of Copepoda (Onychiuridae, Poduridae, Isotomidae, Entomobryidae, Sminthuridae) comprised new records for the Madeira streams. Therefore, further taxonomic and ecological studies on freshwater invertebrates from Madeira Island should be done with a particular focus on these lesser-known groups. Thus, our data increase the geographical data distribution of freshwater macroinvertebrates and their diversity in Madeira Island. This database is an update of geographical information of diversity distribution of Madeira freshwater macroinvertebrates known groups. This information is essential for a better understanding of community composition, diversity, occurrence or spatial distribution, which will help explore different research questions on different research areas, such as community ecology and biogeography.
Keywords	Copepoda ; Entomobryidae ; Isotomidae ; Onychiuridae ; Poduridae ; Sminthuridae ; aquatic invertebrates ; biodiversity ; biogeography ; coasts ; community structure ; databases ; evolution ; fauna ; freshwater ; georeferencing ; macroinvertebrates ; spatial data ; stakeholders ; Portugal
Language	English
Dates of publication	2022-0218
Publishing place	Pensoft Publishers
Document type	Article
ZDB-ID	2736709-5
ISSN	1314-2828
ISSN	1314-2828
DOI	10.3897/BDJ.10.e73909
Database	NAL-Catalogue (AGRICOLA)

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Article: Aquatic Hyphomycetes from streams on Madeira Island (Portugal).

Raposeiro, Pedro M / Faustino, Hélder / Ferreira, Verónica / Gonçalves, Vítor

Biodiversity data journal

2020 Volume 8, Page(s) e53690

Abstract: Background: Aquatic hyphomycetes are a phylogenetically heterogeneous group of fungi living preferentially in fast flowing, well-aerated forest streams. These fungi have worldwide distribution, but with the exception of : New information: In this ... ...

Abstract	Background: Aquatic hyphomycetes are a phylogenetically heterogeneous group of fungi living preferentially in fast flowing, well-aerated forest streams. These fungi have worldwide distribution, but with the exception of New information: In this study, a total of 21 species of aquatic hyphomycetes were recorded belonging to three classes of Ascomycota. All taxa are new records for Madeira Archipelago, except
Language	English
Publishing date	2020-07-08
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2736709-5
ISSN	1314-2828
ISSN	1314-2828
DOI	10.3897/BDJ.8.e53690
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Diatoms from small ponds and terrestrial habitats in Deserta Grande Island (Madeira Archipelago).

Gonçalves, Vítor / Ritter, Catarina / Marques, Helena / Teixeira, Dinarte Nuno / Raposeiro, Pedro M

Biodiversity data journal

2021 Volume 9, Page(s) e59898

Abstract: Background: Freshwater diversity, and diatoms in particular, from Desertas Islands (Madeira Archipelago, Portugal) is poorly known, although the Islands are protected and became a Natural Reserve in 1995. During two field expeditions in 2013 and 2014 to ...

Abstract	Background: Freshwater diversity, and diatoms in particular, from Desertas Islands (Madeira Archipelago, Portugal) is poorly known, although the Islands are protected and became a Natural Reserve in 1995. During two field expeditions in 2013 and 2014 to Deserta Grande Island, several freshwater and terrestrial habitats were sampled. The analysis of these samples aims to contribute to the biodiversity assessment of the freshwater biota present in Deserta Grande Island. Here, we present the diatom diversity in Deserta Grande Island resulting from that survey. This study contributes to improve the knowledge of Madeira Archipelago freshwater diversity, particularly in the Desertas sub-archipelago. New information: To our knowledge, we present the first diatom data for the Desertas sub-archipelago. This work resulted in a list of 60 diatom taxa for Deserta Grande, from which 57 were identified to species level. From the 60 new records for Desertas sub-archipelago, 30 of them were also new records for Madeira Archipelago. Several specimens could not be assigned to a known species and may be new diatom species not yet described.
Language	English
Publishing date	2021-02-12
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2736709-5
ISSN	1314-2828
ISSN	1314-2828
DOI	10.3897/BDJ.9.e59898
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: Cyanobacteria from freshwater lakes in the Azores archipelago, Portugal: data from long term phytoplankton monitoring.

Luz, Rúben / Cordeiro, Rita / Vilaverde, Joana / Raposeiro, Pedro M / Fonseca, Amélia / Gonçalves, Vítor

Biodiversity data journal

2020 Volume 8, Page(s) e51928

Abstract: Background: The Azores are oceanic islands located in the Northern Atlantic Ocean and are particularly rich in aquatic systems, ranging from freshwater, brackish, marine and thermal habitats. Due to the increase in local anthropogenic pressures and ... ...

Abstract	Background: The Azores are oceanic islands located in the Northern Atlantic Ocean and are particularly rich in aquatic systems, ranging from freshwater, brackish, marine and thermal habitats. Due to the increase in local anthropogenic pressures and global warming, several azorean lakes began to reveal signs of eutrophication that led to the implementation of monitoring programmes and management strategies on the most impacted lakes. Later, the Water Framework Directive (2000/60/EC) demanded the establishment of biomonitoring programmes for European freshwater ecosystems and the limited Azorean monitoring programmes were extended to a larger set of lakes. Since the establishment of the aquatic systems monitoring programme in the Azores archipelago, lakes have been regularly sampled, producing innumerous unpublished records of cyanobacteria that are difficult to access. New information: Here we present the occurrences of cyanobacteria in Azorean lakes that result from 22 years of phytoplankton monitoring in a total of 1948 cyanobacteria occurrences from 968 phytoplankton sampling events on Azorean lakes done between 1996 and 2018 as part of regional inland aquatic ecosystems monitoring programmes. Forty two cyanobacteria taxa were identified in those events, 28 species and 14 at genus level. This information is crucial for conservation, biodiversity studies and lake management, as some of the cyanobacteria species present are bloom-forming and have the ability to produce toxins. This will also allow for the identification of invasive species and possible targeted control and mitigation programmes, according to the species present in the Azorean lakes.
Language	English
Publishing date	2020-06-09
Publishing country	Bulgaria
Document type	Journal Article
ZDB-ID	2736709-5
ISSN	1314-2828
ISSN	1314-2828
DOI	10.3897/BDJ.8.e51928
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article ; Online: The vanishing and the establishment of a new ecosystem on an oceanic island - Anthropogenic impacts with no return ticket.

Ritter, Catarina / Gonçalves, Vítor / Pla-Rabes, Sergi / de Boer, Erik J / Bao, Roberto / Sáez, Alberto / Hernández, Armand / Sixto, Marta / Richter, Nora / Benavente, Mario / Prego, Ricardo / Giralt, Santiago / Raposeiro, Pedro M

The Science of the total environment

2022 Volume 830, Page(s) 154828

Abstract: A multiproxy approach was applied to a sediment core retrieved from the deep crater Lake Funda, located in the middle of the North Atlantic Ocean on Flores Island, Azores archipelago (Portugal). The purpose of this study was to determine how this ... ...

Abstract	A multiproxy approach was applied to a sediment core retrieved from the deep crater Lake Funda, located in the middle of the North Atlantic Ocean on Flores Island, Azores archipelago (Portugal). The purpose of this study was to determine how this ecosystem responded to natural and anthropogenic forces over the last millennium. We distinguished three main phases in lake evolution using multiproxy reconstructions and documentary sources. (A) Climate and lake catchment processes, as well as internal ones, were the main drivers of ecosystem variability before 1335 CE, when human disturbances were absent in the Lake Funda catchment. (B) The second phase is marked by unprecedented changes in all studied proxies between 1335 and 1560 CE, including abrupt changes in the composition and diversity of diatom and chironomid assemblages. Synergistic effects from high climate variability and the onset of human disturbances in the catchment (e.g., introduction of livestock) during the Medieval Climate Anomaly-Little Ice Age transition, led to an increase in lake trophic state from mesotrophic to eutrophic conditions. (C) In the last phase (1560 CE to the present), the eutrophic conditions in Lake Funda were maintained through a positive feedback loop between lake productivity and in-lake phosphorous recycling. Variability within the lake ecosystem was mainly associated with climate variability and internal lake dynamics (e.g., phosphorus remobilization). Our results show that a paleoecological approach is crucial to understanding lake ecological states in the present-day in order to develop locally adapted management and restoration strategies. A long-term perspective enables us to understand the harmful consequences of ongoing climate change and human disturbances on lake ecosystems.
MeSH term(s)	Anthropogenic Effects ; Climate Change ; Diatoms ; Ecosystem ; Humans ; Lakes
Language	English
Publishing date	2022-03-26
Publishing country	Netherlands
Document type	Journal Article
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2022.154828
Database	MEDical Literature Analysis and Retrieval System OnLINE

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Article: The vanishing and the establishment of a new ecosystem on an oceanic island – Anthropogenic impacts with no return ticket

Ritter, Catarina / Gonçalves, Vítor / Pla-Rabes, Sergi / de Boer, Erik J. / Bao, Roberto / Sáez, Alberto / Hernández, Armand / Sixto, Marta / Richter, Nora / Benavente, Mario / Prego, Ricardo / Giralt, Santiago / Raposeiro, Pedro M.

Science of the total environment. 2022 Mar. 22,

2022

Abstract: A multiproxy approach was applied to a sediment core retrieved from the deep crater lake Funda, located in the middle of the North Atlantic Ocean on Flores Island, Azores archipelago (Portugal). The purpose of this study was to determine how this ... ...

Abstract	A multiproxy approach was applied to a sediment core retrieved from the deep crater lake Funda, located in the middle of the North Atlantic Ocean on Flores Island, Azores archipelago (Portugal). The purpose of this study was to determine how this ecosystem responded to natural and anthropogenic forces over the last millennium. We distinguished three main phases in lake evolution using multiproxy reconstructions and documentary sources. (A) Climate and lake catchment processes, as well as internal ones, were the main drivers of ecosystem variability before 1335 CE, when human disturbances were absent in the Lake Funda catchment. (B) The second phase is marked by unprecedented changes in all studied proxies between 1335 and 1560 CE, including abrupt changes in the composition and diversity of diatom and chironomid assemblages. Synergistic effects from high climate variability and the onset of human disturbances in the catchment (e.g., introduction of livestock) during the Medieval Climate Anomaly-Little Ice Age transition, led to an increase in lake trophic state from mesotrophic to eutrophic conditions. (C) In the last phase (1560 CE to the present), the eutrophic conditions in Lake Funda were maintained through a positive feedback loop between lake productivity and in-lake phosphorous recycling. Variability within the lake ecosystem was mainly associated with climate variability and internal lake dynamics (e.g., phosphorus remobilization). Our results show that a paleoecological approach is crucial to understanding lake ecological states in the present-day in order to develop locally adapted management and restoration strategies. A long-term perspective enables us to understand the harmful consequences of ongoing climate change and human disturbances on lake ecosystems.
Keywords	Bacillariophyceae ; Chironomidae ; climate ; climate change ; ecosystems ; environment ; eutrophication ; evolution ; humans ; lakes ; livestock ; paleoecology ; phosphorus ; sediments ; watersheds ; Atlantic Ocean ; Azores ; Portugal
Language	English
Dates of publication	2022-0322
Publishing place	Elsevier B.V.
Document type	Article
Note	Pre-press version
ZDB-ID	121506-1
ISSN	1879-1026 ; 0048-9697
ISSN (online)	1879-1026
ISSN	0048-9697
DOI	10.1016/j.scitotenv.2022.154828
Database	NAL-Catalogue (AGRICOLA)

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Z 74/341: Show issues

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Article ; Online: Unraveling the Holocene Eruptive History of Flores Island (Azores) Through the Analysis of Lacustrine Sedimentary Records

Andrade, Mariana / Ramalho, Ricardo S. / Pimentel, Adriano / Hernández, Armand / Kutterolf, Steffen / Sáez, Alberto / Benavente, Mario / Raposeiro, Pedro M. / Giralt, Santiago

2021

Abstract: Lacustrine sequences from active volcanic settings usually hold a rich and continuous record of tephra layers, providing a critical source of information to reconstruct a most complete eruptive history of a region. Lake sedimentary records on volcanic ... ...

Abstract	Lacustrine sequences from active volcanic settings usually hold a rich and continuous record of tephra layers, providing a critical source of information to reconstruct a most complete eruptive history of a region. Lake sedimentary records on volcanic islands are particularly useful as the typical small size of these islands and their steep subaerial and submarine slopes lead to a lower preservation of potential erodible pyroclastic deposits. Here we explore the lacustrine sedimentary record of Lagoa da Lomba, a crater lake in the central upland area of Flores Island (Azores), to gain insight into the recent eruptive history of this island. The strategic location of Lagoa da Lomba, half distance between the two clusters of recent volcanic activity of the island, together with its long-lasting record, back to 23.52 cal kyr BP, makes this lake a privileged site to investigate the Holocene volcanic history of Flores. Based on a detailed stratigraphic characterization of sediments from a lake transect of three cores, supported by glass shard geochemistry and radiocarbon dating, we recognized four Holocene eruptive events taking place between 6.28 and 2.36 cal kyr BP, demonstrating that the Holocene volcanic activity at Flores Island may have lasted longer than previously reported. Glass shard geochemistry from the different tephra layers suggests three populations, basaltic to trachybasaltic in composition, where the last eruption is the least evolved endmember. Two of the four eruptive events correlate with subaerially-exposed pyroclastic sequences, in terms of stratigraphy and geochemistry. The most recent event recorded at Lagoa da Lomba was constrained to 3.66 – 2.36 cal kyr BP and linked to an eruption sourced from Lagoa Comprida Volcanic System. The second most recent eruptive event was sourced from Lagoa Funda Volcanic System and dated at 3.66 cal kyr BP. Our observations show that Flores experienced vigorous volcanic activity during the Late Holocene. Therefore, contrary to what is assumed, the possibility ...
Subject code	550
Language	English
Publishing date	2021-09-29
Publisher	Frontiers
Publishing country	de
Document type	Article ; Online
Database	BASE - Bielefeld Academic Search Engine (life sciences selection)

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