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Nowe gatunki ryjkowców (Coleoptera: Curculionoidea) w Kotlinie Biebrzańskiej New species of weevils (Coleoptera: Curculionoidea) in the Biebrza Basin
Abstract
Records of 24 Curculionoidea species new for the Biebrza Basin in Northeastern Poland, including the Biebrza National Park and its buffer zone, are provided as a result of field studies in 2021-2022. Three more weevil species, unique or rare in Poland, were rediscovered in the Biebrza Basin after nearly 20 years, including Anthonomus rubripes GYLLENHAL previously thought to be extinct. The fauna of the Biebrza Basin comprises currently 505 species of Curculionoidea (Scolytinae excluded), being among the richest documented for protected areas in Northeastern Poland. Noteworthy and alarming is a great decrease in abundance of practically all hygrophilous weevil species observed in the Lower Biebrza, compared to results of previous surveys conducted in 1999-2004.
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The present catalogue is an improved and updated edition of the one published in November 2017.It contains 1627 valid genera, 681 valid subgenera, 15,531 valid species, 1,013 valid subspecies and9,098 names of invalid or nomenclaturally unavailable species-group taxa belonging to the sevenfamilies of Coleoptera Curculionoidea recognised in the Palaearctic Region.
A complete and updated list of 1,066 species and subspecies of the superfamily Curculionoidea recorded from Poland until the end of 2017 is provided, including over 290 comments on all taxonomic, nomenclatural and faunistic changes made since the first edition of the checklist published in 2005. An additional 37 species in the list are considered as erroneously recorded and excluded from the fauna of Poland. An update of the index of genera and subgenera, together with their type species, is provided separately. The following two new synonyms are recognised: Bruchela rufipes nigritarsis (Reitter, 1916) = B. rufipes rufipes (Olivier, 1790) (Anthribidae: Urodontinae), Otiorhynchus proximus iteratus Magnano, 2001 = O. proximus proximus Stierlin, 1861 (Curculionidae: Entiminae). Six species are resurrected from synonymy with the species given in parentheses: Squamapion serpyllicola (Wencker) (S. minutissimum (Rosenhauer)), Polydrusus thalassinus Gyllenhal (P. formosus (Mayer)), Phyllobius vespertinus (Fabricius) (Ph. pyri (L.)), Microplontus melanostigma (Marsham) (M. rugulosus (Herbst)), Otiorhynchus smreczynskii Cmoluch (O. rotundus Marseul), Romualdius angustisetulus (Hansen) (R. scaber (Linnaeus)). Phyllobius fessus Boheman is replaced in the list with Ph. jacobsoni Smirnov due to the former misidentification of Polish specimens. Brachysomus strawinskii Cmoluch is transferred from subgenus Hippomias to Brachysomus s. str. Eleven new weevil species have been discovered in Poland since 2005, including the still unpublished records of Pachycerus madidus (Olivier). The occurrence in Poland of four species, having hitherto only uncertain old records, has been confirmed with recent findings. The number of dubious species in Poland increased to 27 after the inflow of uncertain data in the literature and probable cases of extinction.
Global declines in insects have sparked wide interest among scientists, politicians, and the general public. Loss of insect diversity and abundance is expected to provoke cascading effects on food webs and to jeopardize ecosystem services. Our understanding of the extent and underlying causes of this decline is based on the abundance of single species or taxonomic groups only, rather than changes in insect biomass which is more relevant for ecological functioning. Here, we used a standardized protocol to measure total insect biomass using Malaise traps, deployed over 27 years in 63 nature protection areas in Germany (96 unique location-year combinations) to infer on the status and trend of local entomofauna. Our analysis estimates a seasonal decline of 76%, and mid-summer decline of 82% in flying insect biomass over the 27 years of study. We show that this decline is apparent regardless of habitat type, while changes in weather, land use, and habitat characteristics cannot explain this overall decline. This yet unrecognized loss of insect biomass must be taken into account in evaluating declines in abundance of species depending on insects as a food source, and ecosystem functioning in the European landscape.
Biodiversity of insects is threatened worldwide. Here, we present a comprehensive review of 73 historical reports of insect declines from across the globe, and systematically assess the underlying drivers. Our work reveals dramatic rates of decline that may lead to the extinction of 40% of the world's insect species over the next few decades. In terrestrial ecosystems, Lepidoptera, Hymenoptera and dung beetles (Coleoptera) appear to be the taxa most affected, whereas four major aquatic taxa (Odonata, Plecoptera, Trichoptera and Ephemeroptera) have already lost a considerable proportion of species. Affected insect groups not only include specialists that occupy particular ecological niches, but also many common and generalist species. Concurrently, the abundance of a small number of species is increasing; these are all adaptable, generalist species that are occupying the vacant niches left by the ones declining. Among aquatic insects, habitat and dietary generalists, and pollutant-tolerant species are replacing the large biodiversity losses experienced in waters within agricultural and urban settings. The main drivers of species declines appear to be in order of importance: i) habitat loss and conversion to intensive agriculture and urbanisation; ii) pollution, mainly that by synthetic pesticides and fertilisers; iii) biological factors, including pathogens and introduced species; and iv) climate change. The latter factor is particularly important in tropical regions, but only affects a minority of species in colder climes and mountain settings of temperate zones. A rethinking of current agricultural practices, in particular a serious reduction in pesticide usage and its substitution with more sustainable, ecologically-based practices, is urgently needed to slow or reverse current trends, allow the recovery of declining insect populations and safeguard the vital ecosystem services they provide. In addition, effective remediation technologies should be applied to clean polluted waters in both agricultural and urban environments.
Curculionidae is a hyperdiverse group of beetles, whose taxonomy and phylogenetics is still poorly understood, especially at the genus level. The latest work on the evolution of Apionini showed a noticeable "mess" in the subtribe Oxystomatina, where most of the morphology-based genera were found to be polyphyletic or paraphyletic. These discrepancies between classical taxonomy and molecular phylogenetics implied the need for further taxonomic revision of these groups. Here, we used sets of morphological, molecular and ecological characters to verify the taxonomic statuses and disentangle the phylogenetic relations among the Bothryorrhynchapion apionids, which are classified as a subgenus of Cyanapion. Morphological data including morphometrics, and multilocus molecular analyses confirmed the monophyly of the Bothryorrhynchapion and species statuses of five species. The morphological analyses showed that Cyanapion (Bothryorrhynchapion) protractum (Sharp, 1891) from the southeast Palaearctic is a synonym of C. (B.) gyllenhalii (Kirby). Moreover, ecological features (host plant use and presence/absence of the endosymbiotic bacteria Wolbachia) helped to unravel the relations among the examined weevils. The speciation of Bothryorrhynchapion apionids was probably affected by allopatric distribution, shifts in the preferred host plants (Vicia sp. or Lathyrus sp.) of sympatric taxa, and infection by different strains of Wolbachia. The paper presents the first comprehensive description of the species' morphology, biology and ecology, and includes a key to the species.
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Wpłynęło: 16 marca 2023