Corrigendum: Fuerstia marisgermanicae gen. nov., sp. nov., an Unusual Member of the Phylum Planctomycetes From the German Wadden Sea

AbstractThe historical phylogeography of Ostrea edulis was successfully depicted in its native range for the first time using ancient DNA methods on dry shells from museum collections. This research reconstructed the historical population structure of the European flat oyster across Europe in the 1870s—including the now extinct population in the Wadden Sea. In total, four haplogroups were identified with one haplogroup having a patchy distribution from the North Sea to the Atlantic coast of France. This irregular distribution could be the result of translocations. The other three haplogroups are restricted to narrow geographic ranges, which may indicate adaptation to local environmental conditions or geographical barriers to gene flow. The phylogenetic reconstruction of the four haplogroups suggests the signatures of glacial refugia and postglacial expansion. The comparison with present-day O. edulis populations revealed a temporally stable population genetic pattern over the past 150 years despite large-scale translocations. This historical phylogeographic reconstruction was able to discover an autochthonous population in the German and Danish Wadden Sea in the late nineteenth century, where O. edulis is extinct today. The genetic distinctiveness of a now-extinct population hints at a connection between the genetic background of O. edulis in the Wadden Sea and for its absence until today.

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The Wadden Sea as a National Park and UNESCO World Heritage Site: Students’ Word Associations with These Two Conservation Designations

Sustainability ◽

10.3390/su13148006 ◽

2021 ◽

Vol 13 (14) ◽

pp. 8006

Author(s):

Till Schmäing ◽

Norbert Grotjohann

Keyword(s):

National Parks ◽

National Park ◽

Wadden Sea ◽

World Heritage ◽

World Heritage Site ◽

Unesco World Heritage ◽

Word Associations ◽

Heritage Site ◽

Unesco World Heritage Site ◽

Significant Difference

The Wadden Sea ecosystem is unique in many respects from a biological perspective. This is one reason why it is protected by national parks in Germany and by its designation as a UNESCO World Heritage Site. In biology didactics, there are only a few studies that focus on the Wadden Sea. This work investigates students’ word associations with the two stimulus words “national park” and “UNESCO World Heritage Site”. The survey was conducted among students living directly at the Wadden Sea and among students from the inland. The analysis of the identified associations (n = 8345) was carried out within the framework of a quantitative content analysis to be able to present and discuss the results on a group level. A statistically significant difference was found between the two groups. Overall, results showed that the students made subject-related associations as well as a large number of associations to both stimulus words that could be judged as non-subject-related. In some cases, a connection with the region of residence could be found, but this was not generally the case. Even students’ immediate residential proximity to the Wadden Sea is no guarantee that they have knowledge of the two considered protection terms.

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A Classification Scheme for Sediments and Habitats on Exposed Intertidal Flats with Multi-Frequency Polarimetric SAR

Remote Sensing ◽

10.3390/rs13030360 ◽

2021 ◽

Vol 13 (3) ◽

pp. 360

Author(s):

Wensheng Wang ◽

Martin Gade ◽

Kerstin Stelzer ◽

Jörn Kohlus ◽

Xinyu Zhao ◽

...

Keyword(s):

Classification Scheme ◽

Wadden Sea ◽

Relative Difference ◽

Polarimetric Synthetic Aperture Radar ◽

Intertidal Flats ◽

Sediment Types ◽

X Band ◽

Good Potential ◽

L Band ◽

Sar Data

We developed an extension of a previously proposed classification scheme that is based upon Freeman–Durden and Cloude–Pottier decompositions of polarimetric Synthetic Aperture Radar (SAR) data, along with a Double-Bounce Eigenvalue Relative Difference (DERD) parameter, and a Random Forest (RF) classifier. The extension was done, firstly, by using dual-copolarization SAR data acquired at shorter wavelengths (C- and X-band, in addition to the previously used L-band) and, secondly, by adding indicators derived from the (polarimetric) Kennaugh elements. The performance of the newly developed classification scheme, herein abbreviated as FCDK-RF, was tested using SAR data of exposed intertidal flats. We demonstrate that the FCDK-RF scheme is capable of distinguishing between different sediment types, namely mud and sand, at high spatial accuracies. Moreover, the classification scheme shows good potential in the detection of bivalve beds on the exposed flats. Our results show that the developed FCDK-RF scheme can be applied for the mapping of sediments and habitats in the Wadden Sea on the German North Sea coast using multi-frequency and multi-polarization SAR from ALOS-2 (L-band), Radarsat-2 (C-band) and TerraSAR-X (X-band).

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Sediment dynamics in tidally dominated environments controlled by transport and turbulence: A case study for the East Frisian Wadden Sea

Journal of Geophysical Research Atmospheres ◽

10.1029/2005jc003045 ◽

2007 ◽

Vol 112 (C4) ◽

Cited By ~ 33

Author(s):

E. V. Stanev ◽

G. Brink-Spalink ◽

J.-O. Wolff

Keyword(s):

Wadden Sea ◽

Sediment Dynamics

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Analysis of bacterial communities in a municipal duck pond during a phytoplankton bloom and isolation of Anatilimnocola aggregata , Lacipirellula limnantha and Urbifossiella limnaia belonging to the phylum Planctomycetes

Environmental Microbiology ◽

10.1111/1462-2920.15341 ◽

2020 ◽

Author(s):

Nicolai Kallscheuer ◽

Patrick Rast ◽

Mareike Jogler ◽

Sandra Wiegand ◽

Timo Kohn ◽

...

Keyword(s):

Bacterial Communities ◽

Phytoplankton Bloom ◽

The Phylum Planctomycetes

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A Diachronic Triangular Perspective on Landscapes: a Conceptual Tool for Research and Management Applied to Wadden Sea Salt Marshes

Maritime Studies ◽

10.1007/s40152-021-00215-4 ◽

2021 ◽

Author(s):

Mans Schepers ◽

Erik W. Meijles ◽

Jan P. Bakker ◽

Theo Spek

Keyword(s):

Cultural History ◽

Salt Marshes ◽

Cultural Landscape ◽

Wadden Sea ◽

Driving Forces ◽

Landscape Management ◽

Analytical Framework ◽

Physical Geography ◽

Sea Salt ◽

Conceptual Tool

AbstractStrong disciplinary academic fragmentation and sectoral division in policies lead to problems regarding the management of landscapes. As a result, there is a focus on the preservation and development of either cultural or natural landscapes. We argue that framing landscapes as “natural” or “cultural” will not help sustainable management. The goal of this paper is to show that even what is referred to as nature, virtually always features an intricate combination of physical geography, biology, and cultural history. It provides an analytical framework that visualizes the three forces at play in physical landscapes. Therefore, we introduce a diachronic triangular approach to study and manage landscapes from a holistic point of view, allowing an exchange of different perspectives. To test this approach, we have applied our model to a diachronic case study on Wadden Sea salt marshes. That area has been influenced by physical-geographical, biological, and cultural landscape forces, which are still visible in the landscape to a large extent. By placing different landscape zones in the triangular concept for different time periods, we can identify and visualize these driving forces through time for this specific landscape. These all play their specific roles in the appearance of the landscape over time in a close mutual interconnection. More importantly, we show that the diverse and complex interplay between these forces makes the current-day landscape what it is. We therefore conclude that the diachronic triangular approach provides a conceptual tool to define and operationalize landscape management in the Wadden Sea area. We welcome similar approaches in other landscapes to assess the usefulness of the diachronic triangular landscape approach.

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