1,721,015 research outputs found
FIGURE 1 in Substrate dependent talitrid amphipods from fragmented beaches on the north coast of Crete (Crustacea, Amphipoda, Talitridae), including a redefinition of the genus Orchestia and descriptions of Orchestia xylino sp. nov. and Cryptorchestia gen. nov.
No full textFIGURE 1. Sampling sites. From West to East: a) Sand West; b) Banquette, mainly Posidonia; c) Mixed West; d) Sand East; e) Cobble; f) Mixed East. Pictures were taken during the summer season (July 2012) to highlight the human use of the supralittoral on the two sandy beaches and on Mixed East.Published as part of Lowry, J. K. & Fanini, Lucia, 2013, Substrate dependent talitrid amphipods from fragmented beaches on the north coast of Crete (Crustacea, Amphipoda, Talitridae), including a redefinition of the genus Orchestia and descriptions of Orchestia xylino sp. nov. and Cryptorchestia gen. nov., pp. 201-229 in Zootaxa 3709 (3) on page 203, DOI: 10.11646/zootaxa.3709.3.1, http://zenodo.org/record/21577
On single use plastic straws: Pre-ban findings on touristic beaches in Crete
No full textThis baseline intends to report on littering related to single-use plastic straws, contextualized on two touristic beaches on the Northern shores of Crete (Greece). While beached straws were found to be mainly depending on local drivers, the study further highlighted an additional source of pollution related to plastic straws: the clear wrap in which single-use items can be offered to users. Over the summer months, a number of discarded straw wraps was in fact found, significantly related to both beach width and the presence of colorful straws. Wraps are different in shape, material, as well as likelihood of being dispersed and broken down in the environment, and easily escape estimates from non-targeted sampling. The ban on single use items seems then to be the most effective approach to avoid straws and, indirectly, straw wraps litter or spills
Advances in sandy beach research – Local and global perspectives
No full textSandy beaches are increasingly being considered as social-ecological systems (SES). This implies the consideration of specific sets of proximate and distal drivers acting on them. Hence, ecological and social features as well as their interaction need to be identified, quantified and modeled in order to enable stakeholders and decision-makers to achieve a science-based vision of such a complex system. The urgent demand for integration and multidisciplinarity is therefore an open challenge for all those working on the topic. Information from different disciplines, if considered as part of a holistic perspective as the one required by the approach to SES, maximises its impact and opens new perspectives. A range of dimensions, from local scale to macroareas, still need to be tested to identify the most suitable scale for the observation and depiction of phenomena and trends. Many open challenges then, are awaiting to be taken
Talitrus saltator Montagu 1808
No full textTalitrus saltator (Montagu, 1808) Cancer (Gammarus) saltator Montagu, 1808: 94 pl. 4, fig. 3. Talitrus littoralis Leach, 1814: 402. Talitrus saltator.—H. Milne Edwards, 1830: 364.— Stebbing, 1906: 525.— Chevreux & Fage, 1925: 271, fig. 282.— Chapman & Santler, 1955: 372 (checklist).— Bulycheva, 1957: 129, figs 48 a–c.— J.L. Barnard, 1958: 136.— Den Hartog, 1963: 61 (distribution).— Bousfield & Holthuis, 1969: 111.— Karlbrink, 1969: 328 (distribution).— Lincoln, 1979: 226, fig. 104.— Calvario & Marques, 1983: 88.— Bousfield, 1982: 46, fig. 21.— Bellan-Santini, 1993: 760, fig. 520 (key).— Camur-Elipek & Aslan-Cihangir, 2007: 84 (distribution).— Zakhama-Sraieb, Sghaier & Charfi-Cheikhrouha, 2009: 5, table 3 (distribution).— G. Karaman, 2011: 192. Talitrus locusta.—Bate & Westwood, 1861: 16.— Bate, 1862: 5.— G.O. Sars, 1890: 23, pl. 9.— Della Valle, 1893: 492, 947, pl. 57, figs 52, 53. Talitrus locusta forma mediterranea Chevreux, 1893: 124. Talitrus saltator var. Briani Ruffo, 1936: 28.Published as part of Lowry, J. K. & Fanini, Lucia, 2013, Substrate dependent talitrid amphipods from fragmented beaches on the north coast of Crete (Crustacea, Amphipoda, Talitridae), including a redefinition of the genus Orchestia and descriptions of Orchestia xylino sp. nov. and Cryptorchestia gen. nov., pp. 201-229 in Zootaxa 3709 (3) on page 214, DOI: 10.11646/zootaxa.3709.3.1, http://zenodo.org/record/21577
Orchestia Problem
No full textThe Orchestia Problem For many years talitrid species were placed mainly in Orchestia Leach, 1814 or Talorchestia Dana, 1853. J.L. Barnard (1958) reported 57 species in Orchestia and 41 in Talorchestia, 80 % of the known species at that time. Starting in the early 1970 ’s Bousfield (see Lowry & Bopiah 2012 for a review) began to develop a generic structure for talitrids, which indicated more concise geographic ranges for the genera. Morino & Miyamoto (1988) revised Talorchestia and confined it to 4 species in the western Pacific Ocean, subsequently increased to 9 species (see Lowry & Bopiah 2013). It is now apparent that the approximately 65 talitrid genera are not individually widespread, but occur in well-defined ranges as a result of vicariant dispersal. The exceptions are almost always taxa with anthropogenic dispersal. Bousfield (1982) thought of Orchestia as a coastal Atlantic-Mediterranean genus of about 15 species. His definition took in most, but not all of the European species. Although his definition also took in five New Zealand species Bousfield did not recognise them. Currently Orchestia (sensu lato) contains about 28 species from varied habitats and widespread geography. In this paper we redefine Orchestia to include a marine supralittoral group, from eastern North America, some northeastern Atlantic islands, western Europe and the Mediterranean Sea, plus the anomalous outlier in New Zealand. In addition, we establish the new genus Cryptorchestia, to include nine terrestrial species, previously embedded in Orchestia, from Europe and some islands in the Atlantic Ocean.Published as part of Lowry, J. K. & Fanini, Lucia, 2013, Substrate dependent talitrid amphipods from fragmented beaches on the north coast of Crete (Crustacea, Amphipoda, Talitridae), including a redefinition of the genus Orchestia and descriptions of Orchestia xylino sp. nov. and Cryptorchestia gen. nov., pp. 201-229 in Zootaxa 3709 (3) on page 202, DOI: 10.11646/zootaxa.3709.3.1, http://zenodo.org/record/21577
The coastal talitroid amphipods of New Caledonia (Amphipoda: Talitroidea)
Get PDFOne new genus and three species of talitrid amphipods are described from New Caledonia: Chroestia amoa sp. nov., Talorchestia spinipalma (Dana, 1852), Thiorchestia caledoniana gen. et sp. nov. Descriptions are accompanied by basic ecological information on beaches where the specimens were collected
Disentangling the effects of sandy beach management on intertidal macrobenthic fauna: a path analysis approach
Get PDFSandy beaches are dynamic coastal ecosystems shaped by natural processes and human driven activities, hosting
diverse macrobenthic communities that serve as key indicators of ecological health. This study examines the
interplay between natural and anthropogenic drivers affecting these communities across five beaches along the
Emilia Romagna coast, Italy. By employing path analysis, we quantified the direct and indirect effects of environmental
variables, including sediment characteristics, physical processes, beach morphology, and management
practices. Sampling was conducted at high and low tidal levels, analyzing 330 samples to assess community
structure and diversity. Results reveal that both natural and human drivers significantly influence macrobenthic
communities, with contrasting effects. Positive impacts were associated with beach nourishment, which
increased habitat availability; while practices such as frequent mechanized cleaning and artificial dune construction
negatively impacted diversity and abundance. Other drivers, including erosion and subsidence,
exhibited complex relationships with species richness and community composition, highlighting the role of
beach morphodynamics as a determinant of benthic diversity. Species-specific responses were observed, with the
polychaete Scolelepis (scolelepis) squamata thriving in nourished environments, while Polydora sp. generally
showed sensitivity to disturbance. The dominant bivalve Lentidium mediterraneum displayed neutral responses to
management but was influenced by sediment properties. These findings emphasize the need for adaptive,
ecologically sensitive beach management strategies that balance tourism demands with conservation goals. This
study highlights the value of path analysis in unraveling complex ecological interactions, offering insights for the
sustainable management of sandy beach ecosystems under increasing environmental and anthropogenic pressures.
Future efforts should integrate these findings into broader frameworks addressing coastal resilienc
Cumulative stressors impact macrofauna differentially according to sandy beach type: A meta-analysis
No full textMany studies have demonstrated human impacts on sandy beach macroinvertebrates. However, little is known about causative drivers among multiple co-occurring stressors and how these interact with natural habitat conditions to yield specific faunal responses. We performed a global meta-analysis to shed light on how interactions between human disturbances and beach morphodynamics shape macroinvertebrate populations. We found that supralittoral forms (Talitridae and Ocypodidae) responded more negatively to the Human Modification Metric (a proxy for urbanization) on dissipative beaches, whereas intertidal organisms (Hippidae and Cirolanidae) showed more negative responses on non-dissipative beaches. Based on these findings we propose the Cumulative Harshness Hypothesis (CHH), which predicts higher sensitivity of beach macroinvertebrates to human disturbances when inhabiting a harsher physical environment according to their life histories. Secondly, we compared the response of macroinvertebrates to urbanization levels from local to larger scales (from 500 to 50000 m). Supralittoral families responded more negatively to local urbanization, which leads to habitat loss due to removal or reduction of upper beach zones. Conversely, intertidal organisms with planktonic larval stages were more affected by urbanization at the largest spatial scales, which we hypothesize disrupts metapopulation dynamics by impacting the supply of larvae that could colonize human-disturbed beaches. The differential effects of human disturbances on macroinvertebrates according to beach morphodynamics suggest that the efficiency of these ecological indicators for beach monitoring is context-dependent. Focusing on multiple stressors rather than on a single one is also critical to mitigate human impacts on these threatened ecosystems
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