481 research outputs found
Bryozoa diversity and abundance in Phyllophora crispa (Rhodophyta) mats and Posidonia oceanica meadows near Giglio Island (Tyrrhenian Sea, Italy)
No full textDataset on the epibenthic abundance of Bryozoa on P. crispa and P. oceanica habitats in the NW Mediterranean Sea (Giglio Island, Italy). Samples were obtained via SCUBA diving in summers 2018 and 2019 and analyzed by microscopic determination and counting of specimens. Sampling was part of a larger project on the diversity of the epiphytic invertebrate community on P. crispa mats in the area. The dataset includes details on the sampling efforts, diversity indices (Shannon (H'), Pielou (J')), and density of colonies m-². The numbers of individuals per family were counted on the subsamples. Densities of bryozoa (Dens) were extrapolated using wet weights of the sub- and main sample, as well as the measured surface area of the subsample. Detailed descriptions of the calculations can be found in the corresponding publication (Rossbach et al. (in review))
A Tide of Change: Stories of Marine Conservation Success
No full textSusann Rossbach from Red Sea Global, Lead Author for Saudi Arabia's Frontiers Planet Prize winning paper, presents compelling evidence that marine conservation success is not only possible, it’s already happening. By analyzing 217 verified case studies, her research reveals the social, ecological, and institutional ingredients behind effective ocean stewardship. Rossbach highlights the power of local engagement, multi-stakeholder collaboration, and targeted action against high-impact pressures like overfishing and pollution, reframing marine conservation as a dynamic, hopeful frontier in achieving global sustainability and staying within planetary boundaries.
The thought piece can be found on the Frontiers Planet Prize website and can be accessed via this link.
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Host shift to peas in the diamondback moth Plutella xylostella (Lepidoptera: Plutellidae) and response of its parasitoid Diadegma mollipla (Hymenoptera: Ichneumonidae)
No full textHost shifts in herbivorous insects are thought to sometimes provide enemy-free space on the novel host plant. A population of the diamondback moth Plutella xylostella (Linnaeus), an oligophagous pest on crucifers, recently shifted to sugar snap- and snowpeas (Pisum sativum) in Kenya, resulting in heavy damage to these crops. The impact of this host shift on the interaction with Diadegma mollipla (Holmgren), one of the most frequent parasitoid species attacking P. xylostella in this area, was investigated. Parasitism rates and development of two strains of D. mollipla, one reared from a cabbage-feeding strain of P. xylostella and the second from the new pea-feeding strain, changed based on the host-plant that P. xylostella fed upon, with both parasitoid strains more effective on the novel host plant. Parasitism by the cabbage-D. mollipla strain on P. xylostella infesting peas was four times higher than on P. xylostella infesting cabbage when a single plant species was present. However, when both crops were offered together, the level of parasitism dropped to the level seen when cabbage was offered alone. Diadegma mollipla developed on both hosts, but cabbage-D. mollipla had a longer total development time. Pupae of cabbage-feeding P. xylostella were significantly heavier than pupae of pea-feeding P. xylostella and parasitism had no influence on these differences. Diadegma mollipla preferred to parasitize the pea-feeding P. xylostella. Thus, the host shift by P. xylostella to a novel host plant did not necessarily provide enemy-free space, with the parasitoid species tested. The implications of these findings for the host-parasitoid relationship are discussed
Reference materials and methods in environmental and biochemical research : report on a bilateral cooperation between the Jozef Stefan Institute, Ljubljana, and the KFA Jülich
No full textThe initiative for this fruitful bilateral cooperation goes back on an agreement between Prof. L. Kosta* from IJS and Prof H. W. Nürnberg#, ICH-4, KFA-Jülich. In 1984 both formulated a proposal to exploit the potential of nuclear analytical, electrochemical,and spectrometric techniques for accurate and precise analytical data in biological tissue and organs. Studies related to the assessment of risk to population exposed to industrial emissions was focussed already but the explicit implication of environmentally important research and surveiance programs within the duties of environmental specimen banking was introduced by Dr. Markus Stoeppler in the final version of the first project description. Since then the cooperative efforts were closely related to quality control of analytical results in referencematerials from the German Environmental specimen Bank (ESB) in Jülich, the implementation of more elements in the characterization work and speciation of mercury in environmental and ESB materials. The project lasted for six years (1.1.198631.12.1991)and the following scientists actively participated: From the KFA: Dr. M. Stoeppler, Dr. M. Rossbach, Dr. S. Padberg, DI. K. May From the IJS: Prof. P. Stegnar, Dr. A.R. Byrne, Dr. M. Horvat, Dr. M. Dermelj, Mrs. V. Stibilj. Although this project was formally terminated at the end of 1991 afollow-up program under the running title " Development, validation, and application of NAA and speciation methods in biological materialsll between the same institutions was initiated and will in principle continue the rather effective approach forexchange of experience and joint experiments in one or the other participating laboratory
Mediterranean Red Macro Algae Mats as Habitat for High Abundances of Serpulid Polychaetes
No full textThe Mediterranean Sea harbors more than 17,000 eukaryotic marine species, with several ecosystems recognized as biodiversity hotspots, such as Posidonia oceanica meadows. Recent research indicates that benthic mats formed by the fleshy red alga Phyllophora crispa are also associated with high species richness. Among key groups found in these mats are sessile polychaetes, which live as epiphytes on the red algae thalli. Knowledge of abundance, species richness, and spatial variation of polychaetes associated with these habitats is still scarce. We carried out a comparative assessment focusing on serpulid polychaetes within samples from P. crispa mats and neighboring P. oceanica meadows at six different sampling sites around Giglio Island (Tyrrhenian Sea, Italy). A total of 17 serpulid taxa were identified. The abundance of serpulids (5665 individuals m−2 of P. crispa mat) were similar to neighboring P. oceanica meadows (2304 individuals m−2 leaves and 5890 individuals m−2 shoots). The number of serpulid taxa was significantly higher in P. crispa mats (average 6.63 ± 1.32 taxa) compared to P. oceanica beds (average 1.56 ± 0.63 and 1.84 ± 1.04 taxa in leaves and shoots, respectively). Within habitat type, there were no significant differences in species richness between sites. The most abundant species found was Josephella marenzelleri (61% of individuals), while Vermiliopsis spp. and Bathyvermilia sp. were exclusively found in P. crispa samples. Our results highlight that P. crispa mats host an exceptional diversity and that these habitats should be included in conservation strategies. Further research should focus on the significance of other important taxonomic groups within these mats and evaluate the distribution of P. crispa in different regions of the Mediterranean Sea
Plano diretor: política pública ou discurso ideológico? : estudo de caso - Município de São João - PR
No full textTCC (graduação) - Universidade Federal de Santa Catarina. Centro de Ciências Jurídicas. Direito.Esta monografia tem como objeto de estudo o urbanismo, o planejamento urbano e o Direito Urbanístico no Brasil, analisando políticas públicas e o papel da participação popular no pensamento do futuro das cidades brasileiras, muitas vezes marcadas por graves deficiências nas áreas de transporte, saneamento e habitação. Primeiramente, são apontadas as causas e conseqüências do fenômeno da crescente urbanização observada desde o começo do século XX no Brasil. Após, delineia-se um histórico do desenvolvimento de legislação e políticas públicas específicas para responder às novas demandas urbanas, com especial atenção à Constituição Federal de 1988 e à Lei 10.257 de 2001, conhecida como Estatuto da Cidade. No segundo capítulo, são demonstrados conceito e processo de elaboração e aprovação do plano diretor, além de abordadas as disciplinas do ordenamento urbano. A seguir, no terceiro capítulo, é analisado o histórico da criação de planos diretores no caso da cidade de Florianópolis, bem como o processo de desenvolvimento de seu plano diretor participativo aprovado em 2014. No quarto e último capítulo, são expostos instrumentos de participação popular no planejamento urbano, como plano diretor e orçamento participativos, trazendo, como exemplo deste, a experiência de Porto Alegre
New Insights into a Mediterranean Sea Benthic Habitat : High Diversity of Epiphytic Bryozoan Assemblages on Phyllophora crispa (Rhodophyta) Mats
No full textWith its geographically isolated location and geological history, the Mediterranean Sea harbors well-known biodiversity hotspots, such as Posidonia oceanica seagrass meadows. Recently, long-living mats formed by the fleshy red alga Phyllophora crispa have been described to be associated with a high diversity of sessile invertebrates in the Tyrrhenian Sea. One of the key taxa among these sessile invertebrates are bryozoans: their abundance, diversity, and spatial distribution in P. crispa mats represent a gap in scientific knowledge. Thus, we conducted a pilot study on bryozoan assemblages associated with P. crispa mats around Giglio Island (Tuscan Archipelago, Italy) in 2018, followed by a comparative study on four sites distributed around the island in the subsequent year, 2019. We compared these findings to bryozoan abundance and diversity on P. oceanica shoots and leaves during the second expedition. The findings revealed more than 46 families, with a significantly higher number of taxa identified in P. crispa mats (33) than in P. oceanica meadows (29). The Shannon diversity index was similar between P. crispa and P. oceanica shoots, while Pielou's evenness index was lower in P. crispa mats. The most abundant families reported across all habitats were Crisiidae, Aetidae, and Lichenoporidae; but the most abundant family on P. crispa was Chlidoniidae (Chlidonia pyriformis). The assemblages associated with P. crispa differed among sites, with higher abundances but lower diversity on the exposed southernmost site. The total bryozoan abundance was significantly higher on P. crispa (average 2.83 x 10(6) +/- 1.99 x 10(6) colonies per m(2) seafloor) compared to P. oceanica meadows (average 0.54 x 10(6) +/- 0.34 x 10(6) colonies per m(2) seafloor). Our results show a high diversity of bryozoans on P. crispa thalli compared to P. oceanica meadows, which was consistent throughout the study. These findings confirm the value of the red alga-generated habitat for associated bryozoans and may have implications for future biodiversity assessments and conservation measures
The Author's Care of Himself: On Friedrich Nietzsche, Michel Foucault and Niklas Luhmann
No full textDigitised version produced by the EUI Library and made available online in 2020
Foraminifera diversity and abundance in Phyllophora crispa (Rhodophyta) mats and Posidonia oceanica meadows near Giglio Island (Tyrrhenian Sea, Italy)
No full textDataset on the epibenthic abundance of Foraminifera on P. crispa and P. oceanica habitats in the NW Mediterranean Sea (Giglio Island, Italy). Samples were obtained via SCUBA diving in summer 2019 and analyzed by microscopic determination and counting of specimens. Sampling was part of a larger project on the diversity of the epiphytic invertebrate community on P. crispa mats in the area. The dataset includes details on the sampling efforts, diversity indices (Shannon, Pilou), and density of colonies m-² substrate (Indcount per sqm sub).
The dataset includes information about the ecotype as defined by Mateu-Vicens et al., 2014, the test type (column "Test"), bearing of symbionts (yes (Y), no (N), chloroplast husbandry (CH)), and categorization as Large Benthic Foramineran (LBF; yes (Y) or no (N)), which can be found under "further details"
Serpulid abundances in Phyllophora crispa (Rhodophyta) mats and Posidonia oceanica meadows near Giglio Island (Tyrrhenian Sea, Italy)
No full textThis dataset contains abundance data of Serpulid Polychaetes on four stations around Giglio Island (Tyrrhenian Sea, Italy). All data was generated between May and July 2019 by SCUBA diving. We aimed to assess the diversity and abundance of sessile organisms within the P. crispa mats in comparison to well-investigated P. oceanica meadows
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