TY  - JOUR
A1  - Kortmann, Mareike
A1  - Roth, Nicolas
A1  - Buse, Jörn
A1  - Hilszczański, Jacek
A1  - Jaworski, Tomasz
A1  - Morinière, Jérôme
A1  - Seidl, Rupert
A1  - Thorn, Simon
A1  - Müller, Jörg C.
T1  - Arthropod dark taxa provide new insights into diversity responses to bark beetle infestations
JF  - Ecological Applications
N2  - Natural disturbances are increasing around the globe, also impacting protected areas. Although previous studies have indicated that natural disturbances result in mainly positive effects on biodiversity, these analyses mostly focused on a few well established taxonomic groups, and thus uncertainty remains regarding the comprehensive impact of natural disturbances on biodiversity. Using Malaise traps and meta‐barcoding, we studied a broad range of arthropod taxa, including dark and cryptic taxa, along a gradient of bark beetle disturbance severities in five European national parks. We identified order‐level community thresholds of disturbance severity and classified barcode index numbers (BINs; a cluster system for DNA sequences, where each cluster corresponds to a species) as negative or positive disturbance indicators. Negative indicator BINs decreased above thresholds of low to medium disturbance severity (20%–30% of trees killed), whereas positive indicator BINs benefited from high disturbance severity (76%–98%). BINs allocated to a species name contained nearly as many positive as negative disturbance indicators, but dark and cryptic taxa, particularly Diptera and Hymenoptera in our data, contained higher numbers of negative disturbance indicator BINs. Analyses of changes in the richness of BINs showed variable responses of arthropods to disturbance severity at lower taxonomic levels, whereas no significant signal was detected at the order level due to the compensatory responses of the underlying taxa. We conclude that the analyses of dark taxa can offer new insights into biodiversity responses to disturbances. Our results suggest considerable potential for forest management to foster arthropod diversity, for example by maintaining both closed‐canopy forests (>70% cover) and open forests (<30% cover) on the landscape.
KW  - arthropods
KW  - biodiversity
KW  - conservation
KW  - metabarcoding
KW  - national park
KW  - natural disturbance
KW  - threshold indicator taxa analysis
Y1  - 2022
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-276392
VL  - 32
IS  - 2
ER  - 
TY  - JOUR
A1  - Hardulak, Laura A.
A1  - Morinière, Jérôme
A1  - Hausmann, Axel
A1  - Hendrich, Lars
A1  - Schmidt, Stefan
A1  - Doczkal, Dieter
A1  - Müller, Jörg
A1  - Hebert, Paul D. N.
A1  - Haszprunar, Gerhard
T1  - DNA metabarcoding for biodiversity monitoring in a national park: Screening for invasive and pest species
JF  - Molecular Ecology Resources
N2  - DNA metabarcoding was utilized for a large‐scale, multiyear assessment of biodiversity in Malaise trap collections from the Bavarian Forest National Park (Germany, Bavaria). Principal component analysis of read count‐based biodiversities revealed clustering in concordance with whether collection sites were located inside or outside of the National Park. Jaccard distance matrices of the presences of barcode index numbers (BINs) at collection sites in the two survey years (2016 and 2018) were significantly correlated. Overall similar patterns in the presence of total arthropod BINs, as well as BINs belonging to four major arthropod orders across the study area, were observed in both survey years, and are also comparable with results of a previous study based on DNA barcoding of Sanger‐sequenced specimens. A custom reference sequence library was assembled from publicly available data to screen for pest or invasive arthropods among the specimens or from the preservative ethanol. A single 98.6% match to the invasive bark beetle Ips duplicatus was detected in an ethanol sample. This species has not previously been detected in the National Park.
KW  - biodiversity
KW  - DNA barcoding
KW  - invasive species
KW  - metabarcoding
KW  - monitoring
KW  - pest species
Y1  - 2020
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-217812
VL  - 20
IS  - 6
SP  - 1542
EP  - 1557
ER  -