12 Works

Palaeoecological data of KTG core, Katingan, Central Kalimantan, Borneo, Indonesia

K. Anggi Hapsari, Tim Jennerjahn, Septriono Hari Nugroho, Eko Yulianto & Hermann Behling
Southeast Asian peatlands, along with their various important ecosystem services, are mainly distributed in the coastal areas of Sumatra and Borneo. These ecosystems are threatened by coastal development, global warming and sea level rise (SLR). Despite receiving growing attention for their biodiversity and as massive carbon stores, there is still a lack of knowledge on how they initiated and evolved over time, and how they responded to past environmental change, i.e., precipitation, sea level and...

Shallow-marine carbonate cementation in Holocene segments of the calcifying green alga Halimeda

Thomas Mann , André Wizemann , Marleen Stuhr , Yannis Kappelamann , Alexander Janßen , Jamaluddin Jompa & Hildegard Westphal
Early-diagenetic cementation of tropical carbonates results from the combination of numerous physico-chemical and biological processes. In the marine phreatic environment it represents an essential mechanism for the development and stabilization of carbonate platforms. However, many early-diagenetic cements that developed in the marine phreatic environment are likely to become obliterated during later stages of meteoric or burial diagenesis. In this contribution, a petrographic microfacies analysis of Holocene Halimeda segments collected on a coral island in the...

Antifouling coatings can reduce algal growth in coral aquaculture

Lisa Röpke, David Brefeld, Ulrich Soltmann, Carly Randall, Andrew Negri & Andreas Kunzmann

Measurement of Diffuse Submarine Groundwater Discharge at intertidal puddles at the Königshafen - Sylt

Sebastian Janßen , Alexandra Nozik , Ulf Mallast & Nils Moosdorf
Coastal regions represent a transition between land and sea. From the hydro(geo)logical point of view freshwater and saltwater are coming together here. The groundwater discharge which discharges directly into the sea is called submarine groundwater discharge (SGD). At the regional scale, SGD is often measured indirectly based on tracers. At the local scale, SGD flux over time can be measured directly, e.g. using seepage meters. However, this method only represents the punctual source of discharge....

Data from: Rapid radiation in a highly diverse marine environment

Kosmas Hench, W. Owen McMillan, Oscar Puebla & Martin Helmkampf
Rapid diversification is often observed when founding species invade isolated or newly formed habitats that provide ecological opportunity for adaptive radiation. However, most of the Earth’s diversity arose in diverse environments where ecological opportunities appear to be more constrained. Here, we present a striking example of a rapid radiation in a highly diverse marine habitat. The hamlets, a group of reef fishes from the wider Caribbean, have radiated into a stunning diversity of color patterns...

No warming in the eastern Gulf of Mexico since 1845 recorded by a Siderastrea siderea coral from Cuba

Marie Harbott , Henry C. Wu , Henning Kuhnert , Simone Kasemann , Anette Meixner , Carlos Jimenez , Patricia González-Díaz & Tim Rixen
Changes in the surface ocean pH and temperature caused by the uptake of anthropogenic CO2 are posing a threat to calcifying marine organisms. Recent studies have observed significant impacts on coral reef ecosystems with impaired carbonate skeletal growth and decreased calcification due to acidifying oceans. The current coverage of observations for the northwestern Cuban coastal waters provides an incomplete picture of natural climate variability over interannual to interdecadal timescales, showing the need for high resolution...

SCUBA belt transects for abundance data H. cochlea and H. aequicostatus

Natalia Herrán
Marine symbioses are integral to the persistence of ecosystem functioning in coral reefs. Solitary corals of the species Heteropsammia cochlea and Heterocyathus aequicostatus have been observed to live in symbiosis with the sipunculan worm Aspidosiphon muelleri muelleri, which inhabits a cavity within the coral, in Zanzibar (Tanzania). The symbiosis of these photosymbiotic corals enables the coral holobiont to move, in fine to coarse unconsolidated substrata, a process termed as “walking”. This allows the coral to...

Unique islets in SE Asia: How Holocene climate and sea-level controlled growth of a coral reef island

Yannis Kappelmann, Hildegard Westphal, André Wizemann & Thomas Mann
Coral reef islands are unconsolidated landforms, composed of skeletal carbonate from surrounding reefs and related ecosystems. Facing the predicted rise of sea-level and a changing environment in the next decades, response of low-lying coral reef islands is of great scientific and public interest. To better estimate future behavior, it is necessary to know and classify the effects of past environmental changes on the sedimentary system. In SE Asia, sedimentological understanding of the development of these...

Microplastics alter feeding strategies of a coral reef organism

Marlena Joppien, Hildegard Westphal, Marleen Stuhr & Steve Doo
Increasing marine microplastic pollution has detrimentally impacted organismal physiology and ecosystem functioning. While previous studies document negative effects of microplastics on coral reef animals, the potential responses of organisms such as Large Benthic Foraminifera (LBF) are largely unknown. Here, we document the impact of microplastics on heterotrophic feeding behavior of LBF. Specimens of Amphistegina gibbosa were incubated in three experimental treatments: (1) Artemia sp. nauplii only; (2) pristine microplastic particles only; (3) choice of nauplii...

No short-term effect of sinking microplastics on heterotrophy or sediment clearing in the tropical coral Stylophora pistillata

Sonia Bejarano, Anna Feuring, Valeska Diemel, Mattia Ghilardi & Tilmann Harder
Investigations of encounters between corals and microplastics have, to date, used particle concentrations that are several orders of magnitude above environmentally relevant levels. Here we investigate whether concentrations closer to values reported in tropical coral reefs affect sediment shedding and heterotrophy in reef-building corals. We show that single-pulse microplastic deposition elicits significantly more coral polyp retraction than comparable amounts of calcareous sediments. When deposited separately from sediments, microplastics remain longer on corals than sediments, through...

Dynamic as always – Sedimentary evolution of a coral reef island from the Spermonde Archipelago, Indonesia

Yannis Kappelmann , Hildegard Westphal , Dominik Kneer , André Wizemann & Thomas Mann
Leibniz Centre for Tropical Marine Research (ZMT), Fahrenheitstraße 6, Bremen, Germany(1);University of Bremen, Bibliothekstraße 1, Bremen, Germany(2);Bioplan GmbH, Strandstraße 32a, 18211 Ostseebad Nienhagen, Germany(3);Bundesanstalt für Geowissenschaften und Rohstoffe (BGR), Stilleweg 2, Hannover, Germany(4);The effects of changing climate and environmental conditions on coral reef islands have received a lot of attention, and the findings are discussed broadly. The low elevation of such islands above mean sea level and the largely unconsolidated sediment is exposing them to...

Palaeoecological data of KP core, Kampar Peninsula, Riau, Sumatra, Indonesia

K. Anggi Hapsari, Tim Jennerjahn, Septriono Hari Nugroho, Eko Yulianto & Hermann Behling
Southeast Asian peatlands, along with their various important ecosystem services, are mainly distributed in the coastal areas of Sumatra and Borneo. These ecosystems are threatened by coastal development, global warming and sea level rise (SLR). Despite receiving growing attention for their biodiversity and as massive carbon stores, there is still a lack of knowledge on how they initiated and evolved over time, and how they responded to past environmental change, i.e., precipitation, sea level and...

Registration Year

  • 2022
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Affiliations

  • Leibniz Centre for Tropical Marine Research
    12
  • University of Bremen
    6
  • Federal Institute for Geosciences and Natural Resources
    3
  • Interuniversity Institute for Marine Sciences in Eilat
    2
  • University of Göttingen
    2
  • Helmholtz Centre for Environmental Research
    1
  • Hasanuddin University
    1
  • Universität Hamburg
    1
  • Leibniz Centre for Tropical Marine Research (ZMT)
    1
  • Cyprus Institute
    1