TY  - GEN
A1  - Rojas-Jimenez, Keilor
A1  - Grossart, Hans-Peter
A1  - Cordes, Erik
A1  - Cortés, Jorge
T1  - Fungal Communities in Sediments Along a Depth Gradient in the Eastern Tropical Pacific
T2  - Postprints der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe
N2  - Deep waters represent the largest biome on Earth and the largest ecosystem of Costa Rica. Fungi play a fundamental role in global biogeochemical cycling in marine sediments, yet, they remain little explored. We studied fungal diversity and community composition in several marine sediments from 16 locations sampled along a bathymetric gradient (from a depth of 380 to 3,474 m) in two transects of about 1,500 km length in the Eastern Tropical Pacific (ETP) of Costa Rica. Sequence analysis of the V7-V8 region of the 18S rRNA gene obtained from sediment cores revealed the presence of 787 fungal amplicon sequence variants (ASVs). On average, we detected a richness of 75 fungal ASVs per sample. Ascomycota represented the most abundant phylum with Saccharomycetes constituting the dominant class. Three ASVs accounted for ca. 63% of all fungal sequences: the yeast Metschnikowia (49.4%), Rhizophydium (6.9%), and Cladosporium (6.7%). We distinguished a cluster composed mainly by yeasts, and a second cluster by filamentous fungi, but we were unable to detect a strong effect of depth and the overlying water temperature, salinity, dissolved oxygen (DO), and pH on the composition of fungal communities. We highlight the need to understand further the ecological role of fungi in deep-sea ecosystems.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1013 
KW  - deep-sea
KW  - aquatic fungi
KW  - biodiversity
KW  - Metschnikowia
KW  - Costa Rica
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-482360
SN  - 1866-8372
IS  - 1013
ER  - 
TY  - GEN
A1  - Beermann, Jan
A1  - Westbury, Michael V.
A1  - Hofreiter, Michael
A1  - Hilgers, Leon
A1  - Deister, Fabian
A1  - Neumann, Hermann
A1  - Raupach, Michael J.
T1  - Cryptic species in a well-known habitat
BT  - applying taxonomics to the amphipod genus Epimeria (Crustacea, Peracarida)
T2  - Postprints der Universität Potsdam : Mathematisch Naturwissenschaftliche Reihe
N2  - Taxonomy plays a central role in biological sciences. It provides a communication system for scientists as it aims to enable correct identification of the studied organisms. As a consequence, species descriptions should seek to include as much available information as possible at species level to follow an integrative concept of 'taxonomics'. Here, we describe the cryptic species Epimeria frankei sp. nov. from the North Sea, and also redescribe its sister species, Epimeria cornigera. The morphological information obtained is substantiated by DNA barcodes and complete nuclear 18S rRNA gene sequences. In addition, we provide, for the first time, full mitochondrial genome data as part of a metazoan species description for a holotype, as well as the neotype. This study represents the first successful implementation of the recently proposed concept of taxonomics, using data from high-throughput technologies for integrative taxonomic studies, allowing the highest level of confidence for both biodiversity and ecological research.
T3  - Zweitveröffentlichungen der Universität Potsdam : Mathematisch-Naturwissenschaftliche Reihe - 1059 
KW  - multiple sequence alignment
KW  - Oxidase Subunit-I
KW  - mitochondrial genome
KW  - control region
KW  - Ribosomal-RNA
KW  - asellota crustacea
KW  - gammarus crustacea
KW  - deep-sea
KW  - DNA
KW  - evolution
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:kobv:517-opus4-460792
SN  - 1866-8372
IS  - 1059
ER  -