Search results for "Danger"
showing 10 items of 264 documents
Zbiorowiska z klasy Utricularietea intermedio-minoris DEN HARTOG et SEGAL 1964 em. PIETSCH 1965 w Słowińskim Parku Narodowym
2017
Zbiorowiska z klasy Utricularietea intermedio-minoris DEN HARTOG et SEGAL 1964 em. PIETSCH 1965 należą do wyspecjalizowanych pod względem ekologicznym fitocenoz, występujących w wodach oligotroficznych oraz dystroficznych na podłożu torfowym. Polsce należą do grupy zbiorowisk bardzo słabo zbadanych. W 2014 r. na terenie Słowińskiego Parku Narodowego zbiorowiska z klasy Utricularietea intermedio-minoris zostały stwierdzone w dystroficznym zbiorniku wodnym koło miejscowości Gać. Są to: Sparganietum minimi (współrzędne geograficzne 54°69’05,65’’ N, 17°50’40,42’’ E) oraz Scorpidio-Utricularietum minoris (współrzędne geograficzne 54°69’06,52’’ N, 17°50’50,29’’ E). Akwen, w którym stwierdzono fit…
Fitocenozy mannicy odstającej i solirodu zielnego Puccinellio distantis-Salicornietum brachystachyae (Wilkoń-Michalska 1963) R. Tx. 1974 w rezerwacie…
2019
Rezerwat przyrody Ciechocinek w Ciechocinku o powierzchni 1,88 ha, został założony w 1963 r. w celu ochrony śródlądowych zbiorowisk solniskowych. Od 2009 r. rezerwat zlokalizowany jest w granicach obszaru Natura 2000 Ciechocinek (PLH040019) o powierzchni 13,23 ha. Obecnie najwyższe zasolenie i występowanie fitocenoz zespołu mannicy odstającej i solirodu zielnego Puccinellio distantis-Salicornietum brachystachyae (Wilkoń-Michalska 1963) R. Tx. 1974 zostało stwierdzone w obrębie płytkiego rowu odprowadzającego słone wody burzowe spod tężni solankowych, tężni nr 2 i 3. W latach 2015–2017 r. zbiorowiska solniskowe obejmowały niewielką część rezerwatu i obszaru Natura 2000, o powierzchni około 2…
Eresus kollari (Araneae: Eresidae) calls for heathland management
2011
Northwest Europe’s largest heather-dominated sandy habitats are located in the nature reserve Lu¨neburgerHeide, Germany. Yet, even these appear to be losing their ability to support some of their stenotopic species such as theladybird spider, Eresus kollari Rossi 1846, and are thus becoming increasingly important for the preservation of thesespecies. The habitat requirements of this endangered spider species were investigated in order to obtain data that will helpstabilize the last remnants of the species’ population in northwest Germany. Several heathland habitats were surveyed bypitfall trapping during the mate-search period of the males. Two statistical methods were applied: logistic reg…
ENDOPOLYPLOIDY OF ENDANGERED PLANT SPECIES LIGULARIA SIBIRICA IN DIFFERENT ENVIRONMENTS
2017
The goal of this study was to detect endopolyploidy of Ligularia sibirica from populations existed in different ecological conditions. This is important step to elaborate the appropriate protection measures of rare and endangered species, which should be based on understanding of ongoing processes in populations. From this point of view the knowledge of genetic diversity, including endopolyploidy level between and within populations, is crucial. L. sibirica is endangered and protected plant species in Latvia which is included in the protected plants list of EU Habitat directive 92/43/EEK Annexes 2 and 4. Perennial herbaceous plant L. sibirica is one of two species of genus Ligularia in Euro…
Woodland key habitats evaluated as part of a functional reserve network
2010
Abstract Woodland key habitats (WKHs) represent a potentially cost-efficient means to protect biodiversity in managed forests. The Forest Act of Finland defines 13 habitat types of WKHs, which enjoy legal protection. It has been argued that WKHs are too small-sized and scattered in occurrence to be actually important in the maintenance of forest biodiversity. However, from the species’ perspective, WKHs form a network together with nature reserves. We evaluated the value and role of WKHs as a part of the whole reserve network using a graph-theoretical connectivity approach in three areas (ca. 500 km 2 each) located in Central Finland. The networks were formed separately for different habita…
Low effective population sizes and limited connectivity inxerothermic beetles: implications for the conservation ofan endangered habita
2014
Fragmentation and isolation may have detrimental effects on the viability of populations. Xerothermic grasslands, which are extra-zonal analogues of steppes, are among Europe's most endangered natural environments. Information about connectivity between the remaining habitat patches is critical for effective conservation planning. However, very little is known about the actual levels of isolation of individual xerothermic patches at the inter-regional and local scale. In this study, 16 microsatellite loci were used to investigate genetic diversity, structuring, effective sizes (Ne), and connectivity among populations of the weevil Centricnemus leucogrammus at various geographic scales. Anal…
Supplementary material 1 from: Pirie MD, Chatrou LW, Maas PJM (2018) A taxonomic revision of the Neotropical genus Cremastosperma (Annonaceae), inclu…
2018
A file incorporating the georeferenced part of this data that can be opened in Google Earth :
Supplementary material 2 from: Pirie MD, Chatrou LW, Maas PJM (2018) A taxonomic revision of the Neotropical genus Cremastosperma (Annonaceae), inclu…
2018
Full tables of Cremastosperma collections data (CSV, XLS and DBF formats) : Data type: occurences
Environmental DNA analysis indicates that migration barriers are decreasing the occurrence of European eel (Anguilla anguilla) in distance from the s…
2020
Abstract The European eel (Anguilla L.) is considered critically endangered by the IUCN Red List, and recruitment remains low. One of the challenges for the species today is migration barriers that limit their habitat. Along the Norwegian coast, like in other countries, the abundance of eels appears to decrease with distance from the sea. This pattern may be a result of factors like water temperature, water quality, competition, and habitat suitability and availability. This study aims to use environmental DNA (eDNA) analysis to investigate the potential relationship between migration barriers and the decreasing occurrence of eels in distance from the sea by the coast of southern Norway. Si…
The macrophyte, Stratiotes aloides, protects larvae of dragonfly Aeshna viridis against fish predation
2004
Predation could be one force determining which contemporary species occupy a certain habitat. Aeshna viridis is an endangered dragonfly species with a larval distribution strongly associated with lakes where the water plant, water soldier, Stratiotes aloides, occurs. In this study, the larvae were almost exclusively found in patches of S. aloides. To study larval association with S. aloides further, we conducted a series of laboratory experiments. Behavioural experiments indicated that larvae preferred S. aloides. Aeshna viridis larvae were nocturnal and rather inactive. Larvae on S. aloides were less susceptible to predation by the perch, Perca fluviatilis, than larvae on another water pla…