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Raw data of physical oceanography during RV HEINCKE cruise HE662

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE . The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Raw data of physical oceanography during RV HEINCKE cruise HE491

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE. The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

Einfluss verschiedener menschlicher Belastungen auf Fliessgewaesser in Nordhessen und Suedniedersachsen

Aufeinander folgende Untersuchungen von Kuehlwassereinleitungen in Fliessgewaesser sind in der Bundesrepublik Deutschland im Freiland bisher nur in wenigen Faellen durchgefuehrt worden. Sie kamen zu z.T widerspruechlichen Ergebnissen. An der Schwalm, einem organisch maessig belasteten Mittelgebirgsfluss in Nordhessen, sollen weitere Erkenntnisse zur Waermebelastung von Fliessgewaessern gewonnen werden. Pilotstudie 1978/79: An 9 ueber die gesamte Flusslaenge verteilten Probestellen wurden physikalische und chemische Messgroessen, Plankton, Aufwuchs, Uferbewuchs, hoehere Wasserpflanzen und Makroinvertebraten erfasst. Besonderer Aspekt waren komunale Abwaesser und Waermeinleitungen. Hauptstudie I 1980 bis 1982: Kleinraeumig an 5 Probestellen im Unterlauf der Schwalm wurden physikalische und chemische Parameter, Bakterien, hoehere Wasserpflanzen und Makroinvertebraten bearbeitet. Besonderer Aspekt war der Einfluss von Kuehlwasser aus dem Braunkohlekraftwerk Borken. Hauptstudie II 1986 bis 1988: Erfassung von physikalischen und chemischen Daten, Makrozoobenthos, Emergenz (Produktionsoekologie) unter besonderer Beruecksichtigung von Kuehlwassereinleitungen im Unterlauf der Schwalm.

Ecosystem Engineering: Sediment entrainment and flocculation mediated by microbial produced extracellular polymeric substances (EPS)

Sediment erosion and transport is critical to the ecological and commercial health of aquatic habitats from watershed to sea. There is now a consensus that microorganisms inhabiting the system mediate the erosive response of natural sediments ('ecosystem engineers') along with physicochemical properties. The biological mechanism is through secretion of a microbial organic glue (EPS: extracellular polymeric substances) that enhances binding forces between sediment grains to impact sediment stability and post-entrainment flocculation. The proposed work will elucidate the functional capability of heterotrophic bacteria, cyanobacteria and eukaryotic microalgae for mediating freshwater sediments to influence sediment erosion and transport. The potential and relevance of natural biofilms to provide this important 'ecosystem service' will be investigated for different niches in a freshwater habitat. Thereby, variations of the EPS 'quality' and 'quantity' to influence cohesion within sediments and flocs will be related to shifts in biofilm composition, sediment characteristics (e.g. organic background) and varying abiotic conditions (e.g. light, hydrodynamic regime) in the water body. Thus, the proposed interdisciplinary work will contribute to a conceptual understanding of microbial sediment engineering that represents an important ecosystem function in freshwater habitats. The research has wide implications for the water framework directive and sediment management strategies.

Benthische Fliesswasserorganismen als Schadstoffvektoren

Langzeit (Teillebenszyklus) - Exposition von aquatischen Insekten mit aerischen Imaginalstadien. Schadstoffexposition der Larven (vom Eistadium an). Messung des Schadstoffes im Milieu in Larven und Imagines. Erarbeitung von Schaedigungskriterien bei den exponierten Larven.

Stoffhaushalt und Stoffumsetzungen in einem kleinen Mittelgebirgsbach des suedlichen Schwarzwaldes

Biologie benthischer Siphonophoren und Ctenophoren: Beschreibung neuer Arten, ihrer Lebensweise und Verbreitung

Die Erfassung der biologischen Artenvielfalt ist seit einigen Jahren erklärtes Ziel internationaler Forschung (AGENDA SYSTEMATIK 2000). Bei den weltweiten biologischen, geologischen und mikrobiologischen Einsätzen unseres Tauchbootes 'JAGO' unterhalb der photischen Zone stoßen wir immer wieder auf bisher unbekannte Lebensformen. Manche dieser Arten werden von uns in situ dokumentiert, gesammelt und zur späteren Identifizierung oder Beschreibung konserviert. Darunter befanden sich in den letzten Jahren einige neue benthische Staatsquallen (Rhodaliiden) und Ctenophoren (Lyrocteniden). Beide Formen sind wenig erforscht und sehr außergewöhnlich, da die meisten Vertreter dieser Taxa pelagisch leben. Dieser Antrag gilt der taxonomischen und verhaltensökologischen Beschreibung der gesammelten Arten beider Gruppen.

Seawater carbonate chemistry and benthic foraminifera Ammonia sp. mass, size, and growth rate during experiments, 2013

About 30% of the anthropogenically released CO2 is taken up by the oceans; such uptake causes surface ocean pH to decrease and is commonly referred to as ocean acidification (OA). Foraminifera are one of the most abundant groups of marine calcifiers, estimated to precipitate ca. 50 % of biogenic calcium carbonate in the open oceans. We have compiled the state of the art literature on OA effects on foraminifera, because the majority of OA research on this group was published within the last three years. Disparate responses of this important group of marine calcifiers to OA were reported, highlighting the importance of a process-based understanding of OA effects on foraminifera. We cultured the benthic foraminifer Ammonia sp. under a range of carbonate chemistry manipulation treatments to identify the parameter of the carbonate system causing the observed effects. This parameter identification is the first step towards a process-based understanding. We argue that CO3 is the parameter affecting foraminiferal size-normalized weights (SNWs) and growth rates. Based on the presented data, we can confirm the strong potential of Ammonia sp. foraminiferal SNW as a CO3 proxy.

Raw data of physical oceanography during RV HEINCKE cruise HE660

Raw physical oceanography data was acquired by a ship-based Seabird SBE911plus CTD-Rosette system onboard RV HEINCKE . The CTD was equipped with duplicate sensors for temperature (SBE3plus) and conductivity (SBE4) as well as one sensor for oxygen (SBE43). Additional sensors such as a WET Labs C-Star transmissometer, a WET Labs ECO-AFL fluorometer (FLRTD) and an altimeter (Teledyne Benthos PSA-916) were mounted to the CTD. The data was recorded using pre-cruise calibration coefficients. No correction, post-cruise calibration or quality control was applied. Processed profile data are available via the link below.

LTER Benthos – German Bight: Long-term ecological research of benthos in the German Bight (2001 et seq)

The long-term ecological research benthic monitoring comprises four representative permanent stations (SSd, Slt, FSd and WB) that have been sampled continuously in spring since 1969. The four stations are representative for the different benthic communities in the German Bight. Inter-annual variability and possible long-term trends were analysed based on spring-time samples since 1969. Macrozoobenthos of soft-bottom benthic community was collected by van-Veen grabs. Data for each campaign comprise four stations in the German Bight, sampled by grab samples (infauna). Biodiversity data of species include abundance (count data) and biomass (wet mass, g) per sample. The data is also available in a PostgreSQL-based data warehouse that can be accessed and queried through an open-access frontend web service at https://critterbase.awi.de/benosis by searching for the data sets "LTER_Benthos". Earlier datasets covering the years 1969-2000 have been published in the publication series https://doi.org/10.1594/PANGAEA.667646.

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