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You searched for: Journal Helgoland marine research Remove constraint Journal: Helgoland marine research Publication Year 2019 Remove constraint Publication Year: 2019 Source 2019 v.73 no.1 Remove constraint Source: 2019 v.73 no.1
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1. An exclusion experiment to study the influence of habitat structure provided by Mussismilia corals (Cnidaria; Anthozoa) on the predation of associated crustaceans

Author:
Nogueira, Marcos M.; Neves, Elizabeth; Johnsson, Rodrigo
Source:
Helgoland marine research 2019 v.73 no.1 pp. 7
ISSN:
1438-387X
Subject:
Anthozoa; Crustacea; cages; corals; fauna; foraging; habitats; predation; predators
Abstract:
... Predation is an interaction between species that influences community organisation by the direct consumption of prey, influencing prey numbers, behaviours and traits. The intensity of predation is greatly influenced by the environment, and the physical structure of habitats may influence predation intensity by providing refuge for prey or reducing the foraging efficiency of predators. In this cont ...
DOI:
10.1186/s10152-019-0529-7

2. An updated phytoplankton check-list for the Helgoland Roads time series station with eleven new records of diatoms and dinoflagellates

Author:
Kraberg, Alexandra; Kieb, Ute; Peters, Silvia; Wiltshire, Karen Helen
Source:
Helgoland marine research 2019 v.73 no.1 pp. 9
ISSN:
1438-387X
Subject:
Alexandrium; Bacillariophyceae; Chaetoceros; Dinophysis; ecosystems; metadata; phytoplankton; scanning electron microscopes; scanning electron microscopy; surveys; time series analysis; toxicity
Abstract:
... The Helgoland Roads time series is one of the longest and most detailed time series in the world. It comprises daily phytoplankton counts accompanied by physico-chemical measurements. As such, it provides valuable long-term record of changes and their underlying causes in the phytoplankton community around Helgoland. This work provides an updated check-list of the phytoplankton species encountered ...
DOI:
10.1186/s10152-019-0528-8

3. Cuttlebone morphometrics and sex identification of Sepia bertheloti (d’Orbigny, 1835) from the central-east Atlantic

Author:
Guerra-Marrero, Airam; Jiménez-Alvarado, David; Hernández-García, Vicente; Curbelo-Muñoz, Leticia; Castro-Hernández, José Juan
Source:
Helgoland marine research 2019 v.73 no.1 pp. 10
ISSN:
1438-387X
Subject:
Sepia; females; gonads; males; morphometry; oocytes; Africa
Abstract:
... Analysis of 322 cuttlebones of Sepia bertheloti caught in the waters of the Northwest Africa showed significant differences in growth between males and females. Morphometric analysis revealed a relatively different cuttlebone growth pattern between sexes, with males presenting faster growth in length to reach larger sizes and females displaying greater growth in width. This difference in cuttlebon ...
DOI:
10.1186/s10152-019-0531-0

4. Dual culture of the oomycete Lagenisma coscinodisci Drebes and Coscinodiscus diatoms as a model for plankton/parasite interactions

Author:
Buaya, Anthony; Kraberg, Alexandra; Thines, Marco
Source:
Helgoland marine research 2019 v.73 no.1 pp. 2
ISSN:
1438-387X
Subject:
Bacillariophyceae; Coscinodiscus; Lagenisma; culture flasks; hosts; models; parasitoids; pathogens; photosynthesis; plankton; spores; tissue culture
Abstract:
... Diatoms are thought to provide about 40% of total global photosynthesis and diatoms of the genus Coscinodiscus are an important, sometimes dominant, cosmopolitan component of the marine diatom community. The oomycete parasitoid Lagenisma coscinodisci is widespread in the northern hemisphere on its hosts in the genus Coscinodiscus. Because of its potential ecological importance, it would be a suita ...
DOI:
10.1186/s10152-019-0523-0

5. Effects of elevated temperature and sedimentation on grazing rates of the green sea urchin: implications for kelp forests exposed to increased sedimentation with climate change

Author:
Traiger, Sarah B.
Source:
Helgoland marine research 2019 v.73 no.1 pp. 5
ISSN:
1438-387X
Subject:
Strongylocentrotus droebachiensis; Strongylocentrotus nudus; ambient temperature; climate change; grazing; macroalgae; macroinvertebrates; melting; sediment yield; sedimentation rate; sediments; species diversity; water temperature; Alaska
Abstract:
... Sea urchin grazing rates can strongly impact kelp bed persistence. Elevated water temperature associated with climate change may increase grazing rates; however, these effects may interact with local stressors such as sedimentation, which may inhibit grazing. In Alaska, glacial melt is increasing with climate change, resulting in higher sedimentation rates, which are often associated with lower gr ...
DOI:
10.1186/s10152-019-0526-x

6. Evaluating the potential impact of bird predation on the SW Atlantic fiddler crab Leptuca uruguayensis

Author:
Ribeiro, Pablo D.; Navarro, Diego D.; Jaureguy, Luciano M.; Daleo, Pedro; Iribarne, Oscar O.
Source:
Helgoland marine research 2019 v.73 no.1 pp. 6
ISSN:
1438-387X
Subject:
Arenaria interpres; Laridae; Monte Carlo method; Numenius; Pluvialis squatarola; Uca; birds; computer simulation; crabs; models; monitoring; predation; predator avoidance; Argentina
Abstract:
... The southernmost permanent population of the fiddler crab Leptuca uruguayensis occurs along the Samborombón Bay (36°22′S, 56°45′W, Argentina), an important feeding site for many bird species, including ruddy turnstones (Arenaria interpres), whimbrels (Numenius phaeopus), grey plovers (Pluvialis squatarola), american golden plovers (Pluvialis dominica) and gull-billed terns (Gelochelidon nilotica). ...
DOI:
10.1186/s10152-019-0527-9

7. Is food supply for shellfish-eating birds in the western Wadden Sea affected by the between-species synchrony in year-to-year fluctuations of bivalve population parameters?

Author:
Beukema, J. J.; Dekker, R.
Source:
Helgoland marine research 2019 v.73 no.1 pp. 8
ISSN:
1438-387X
Subject:
Cerastoderma edule; Mya arenaria; Mytilus edulis; biomass; birds; ecosystems; food availability; monitoring; survival rate; suspension feeding; winter; North Sea
Abstract:
... For a better understanding of functioning and stability of ecosystems, it is important to know to what extent constituent species show similarity in their long-term fluctuation patterns, i.e. whether their numbers and biomass frequently show simultaneous peaks and lows. Synchronic peaks and lows of important species would enhance variability in the functioning of the entire system and might affect ...
DOI:
10.1186/s10152-019-0530-1

8. Parasites of fish Poecilia velifera and their potential as bioindicators of wetland restoration progress

Author:
Morales-Serna, Francisco N.; Rodríguez-Santiago, María A.; Gelabert, Rolando; Flores-Morales, Luz M.
Source:
Helgoland marine research 2019 v.73 no.1 pp. 1
ISSN:
1438-387X
Subject:
Argulus; Contracaecum; Ergasilus; Gyrodactylus; Poecilia latipinna; Trematoda; ecosystems; environmental health; fish; host-parasite relationships; new host records; parasites; wetlands; Gulf of Mexico
Abstract:
... Fish harbor a high diversity of parasites that play an important role for the ecosystem. Because these parasites have different life-cycle traits, changes in their populations or communities may provide useful information related to ecosystem health. Highly stressful conditions may reduce parasite communities or populations. However, it is not a rule since host-parasite interactions are hardly pre ...
DOI:
10.1186/s10152-019-0522-1

9. Progress and perspectives in the discovery of polychaete worms (Annelida) of the world

Author:
Pamungkas, Joko; Glasby, Christopher J.; Read, Geoffrey B.; Wilson, Simon P.; Costello, Mark J.
Source:
Helgoland marine research 2019 v.73 no.1 pp. 4
ISSN:
1438-387X
Subject:
Nereididae; Serpulidae; fauna; models
Abstract:
... Despite the availability of well-documented data, a comprehensive review of the discovery progress of polychaete worms (Annelida) has never been done. In the present study, we reviewed available data in the World Register of Marine Species, and found that 11,456 valid species of Recent polychaetes (1417 genera, 85 families) have been named by 835 first authors since 1758. Over this period, three d ...
DOI:
10.1186/s10152-019-0524-z

10. Satellite observations of the effect of the “Godzilla El Niño” on the Tehuantepec upwelling system in the Mexican Pacific

Author:
Coria-Monter, Erik; Salas de León, David Alberto; Monreal-Gómez, María Adela; Durán-Campos, Elizabeth
Source:
Helgoland marine research 2019 v.73 no.1 pp. 3
ISSN:
1438-387X
Subject:
El Nino; advection; chlorophyll; environmental monitoring; marine environment; moderate resolution imaging spectroradiometer; remote sensing; satellites; surface water temperature; time series analysis; wind speed; winter; Pacific Ocean
Abstract:
... During 2015–2016, a strong El Niño, the “Godzilla El Niño,” which is similar to El Niño events that occurred in 1982/1983 and 1997/1998, occurred in the Pacific Ocean. In this paper, we report on the influence of the “Godzilla El Niño” on the sea surface temperature (SST) and chlorophyll-a (Chla) concentrations in the Tehuantepec upwelling system using satellite observation data. A time-series of ...
DOI:
10.1186/s10152-019-0525-y