Spatio-temporal variation of the invasive copepod Oithona davisae in the zooplankton community of Kavala harbour

KOURKOUTMANI, POLYXENI; Loufi, Katerina; KALANTARIDOU, GEORGIA; Karagianni, Aikaterini; Michaloudi, Evangelia

doi:10.12681/mms.32127

Cited by 2 publications

(1 citation statement)

References 32 publications

(43 reference statements)

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“…The high N/P ratio in combination with the extreme NH 4 concentrations measured during 2017-2018 may be linked to the relatively high contribution of dinoflagellates, such as Noctiluca scintillans and Spatulodinium pseudonoctiluca, to plankton community biomass and increased red tides [6]. Similarly, the N/P ratio was high (19.5) during the years 2020-2022 [120], indicating increased nitrogen loadings.…”

Section: Nutrient Pressuresmentioning

confidence: 95%

Oceanographic Research in the Thermaikos Gulf: A Review over Five Decades

Androulidakis,

Makris,

Kombiadou

et al. 2024

JMSE

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The Thermaikos Gulf (TG) is a semi-enclosed, river-influenced, marine system situated in the eastern Mediterranean Sea, sustaining both urban coastal regions and ecologically preserved natural areas. Facing a plethora of environmental and anthropogenic pressures, the TG serves as a critical nexus where human activities intersect with marine ecosystems. The quality and health of the TG’s marine environment are tightly linked to the socioeconomic activities of the coastal communities comprising approximately 1.5 million inhabitants. The main features of the TG’s environmental dynamics and ecological status have been scrutinized by dedicated research endeavors during the last 50 years. This review synthesizes the seminal findings of these investigations, offering an evaluation of their contribution to research, their present collective impact, and their trajectory toward the future. A severe deterioration of the TG’s environmental quality was detected in the 1970s and 1980s when the treatment of urban wastewater was completely absent. A steady trend of recovery was observed after the 1990s; however, so far, the goal of a “good environmental state” mandated by national legislation and European directives has not been achieved. A clear reduction in research was detected after 2010, associated with the recession of the Greek economy, following the “golden period” for research in the TG from the mid-1990s until the late 2000s. The most important research gaps and uncertainties are discussed, while specific targeted recommendations for the improvement of monitoring and understanding of the physical, biochemical, and ecological state of the gulf are provided: (i) increase in permanent observational stations (temporally and spatially); (ii) inclusion of all major environmental parameters; (iii) monitoring of the quantity and quality of all land-originated freshwater discharges; (iv) monitoring and management of important aspects of the marine environment that have received minimal attention in the past (e.g., coastal erosion, plastic pollution); (v) development of accurate prediction tools (e.g., numerical techniques) to support first-level responders and efficient management; (vi) establishment of a supervising public entity that would support the holistic overview and management of the entire TG. These suggestions are directed at overcoming the existing uncertainties in the knowledge of the TG, safeguarding its ecological integrity and its role as a crucial link to marine biodiversity and sustainability in the Mediterranean basin.

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Section: Nutrient Pressuresmentioning

confidence: 95%

Oceanographic Research in the Thermaikos Gulf: A Review over Five Decades

Androulidakis,

Makris,

Kombiadou

et al. 2024

JMSE

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Synchaeta’s community in the urban coastal area of the Thessaloniki Bay

Kourkoutmani,

Iliadou,

Vlachodimou

et al. 2023

Hydrobiologia

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Rotifers’ presence and significance are being underestimated among marine zooplankton because rotifers are lost when using larger mesh size nets. Furthermore, samples’ preservation often makes species identification difficult, creating a knowledge gap regarding their diversity and abundance in coastal ecosystems. Our study aimed to address this gap by documenting the biodiversity and distribution patterns of the rotifer species, exploring their relationships with the components of the zooplankton community and determining the environmental variables driving their seasonal dynamics. Samplings were carried out in an urban coastal area in the North Aegean Sea in Greece, within two sampling periods. Four coexisting Synchaeta species were encountered, whose temporal distribution patterns were mainly driven by temperature; S. neapolitana exhibited a preference for colder temperatures, contrary to the thermophilic distribution patterns of S. baltica and S. vorax. Network analysis unveiled several negative links among Synchaeta species and other zooplankton taxa, suggesting potential competitive trophic interactions. The present study is one of the very few dealing with marine rotifers across the Mediterranean Sea and thus provides a significant contribution to our understanding of the dynamics of this group of micrometazoans.

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Spatio-temporal variation of the invasive copepod Oithona davisae in the zooplankton community of Kavala harbour

Cited by 2 publications

References 32 publications

Oceanographic Research in the Thermaikos Gulf: A Review over Five Decades

Oceanographic Research in the Thermaikos Gulf: A Review over Five Decades

Synchaeta’s community in the urban coastal area of the Thessaloniki Bay

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