scholarly journals Freshwater aquatic invertebrates on the Isle of May, Scotland

2021 ◽  
Vol 27 (3) ◽  
pp. 42-47
Author(s):  
C.R. Macadam
Keyword(s):  
Climate Warming ◽  
Aquatic Invertebrates ◽  
Invertebrate Fauna ◽  
Freshwater Invertebrates ◽  
Freshwater Invertebrate ◽  
Freshwater Habitats

The invertebrate fauna of freshwater habitats on the Isle of May, Scotland was investigated and compared with the results from surveys undertaken in 1958. Overall, the freshwater invertebrate fauna appears to be diminished. However, several species were recorded as new to the Isle of May. Although the reasons for the apparent decline in freshwater invertebrates on the island are unclear, an increase in the temporary nature of the habitats due to climate warming may be a contributing factor.

scholarly journals Preliminary data on the aquatic invertebrate fauna of the Ma River, Thanh Hoa province

2014 ◽  
Vol 6 (3) ◽  
pp. 220-226
Author(s):  
Xuan Nam Ngo ◽  
Quoc Huy Nguyen ◽  
Nguyen Hang Nguyen ◽  
Thi Diep Pham ◽  
Trong Hoang Mai ◽  
...  
Keyword(s):  
Aquatic Invertebrates ◽  
Field Survey ◽  
Multivariable Analysis ◽  
Aquatic Invertebrate ◽  
Species Number ◽  
Invertebrate Fauna ◽  
Significant Relation ◽  
The North ◽  
Freshwater Habitats ◽  
Data Book

A field survey for the invertebrate fauna conducted in the Ma River, Thanh Hoa province in 2013. The research applied multivariable analysis performed by the Primer v.6 software, such as CLUSTER, one-way ANOSIM, BEST and DIVERSE. The results showed a list of 138 aquatic invertebrate species. Of these, most were freshwater wide-distributing species coupled with others characterized for brackish and marine waters. The biodiversity status was quite high compared to several other rivers in the North of Vietnam. The list contained many economic-valued species and 2 of these were listed in the Red Data Book of Vietnam. The aquatic invertebrates showed a significant relation to the two different combinations of physiochemical factors for zooplanktons and zoobenthos, respectively. The values of the species number, abundance and Shannon-Weiner index for both of zooplanktons and zoobenthos showed a curved trend from the upper river segments to lower river segments. These figures for zooplanktons peaked in the middle river segments, whereas the numbers for zoobenthos achieved the highest numbers in the estuaries. The species composition of the estuaries differentiated significantly from that of other freshwater habitats. Năm 2013 đã tiến hành một đợt điều tra khu hệ động vật không xương sống sông Mã, tỉnh Thanh Hóa. Nghiên cứu sử các phân tích đa biến thông qua phần mền Primer v.6, bao gồm: CLUSTER, one-way ANOSIM, BEST và DIVERSE. Kết quả phân tích thu được 138 loài với thành phần loài chủ yếu là những loài nước ngọt thường gặp và phân bố rộng, ngoài ra còn có các loài đặc trưng cho nước lợ và mặn. Trong số các loài thu được, nhiều loài có giá trị kinh tế và 2 loài có tên trong Sách Đỏ Việt Nam. Khu hệ động vật không xương sống sông Mã có quan hệ chặt với hai nhóm chỉ số thủy lý hóa học khác nhau, tương ứng cho động vật nổi và động vật đáy. Giá trị các chỉ số sinh học gồm số lượng loài, mật độ và Shannon-Weiner hồi quy theo đường cong phi tuyến từ thượng lưu tới hạ lưu; đạt giá trị cao nhất tại cửa sông đối với động vật đáy và vùng trung lưu với động vật nổi. Thành phần loài cửa sông khác biệt rõ rệt với thành phần loài các sinh cảnh nước ngọt khác.

Toxicity bioassays of cadmium on selected freshwater invertebrates and the interaction of cadmium and zinc on the freshwater shrimp, Paratya tasmaniensis Riek

1974 ◽  
Vol 25 (1) ◽  
pp. 97 ◽  
Author(s):  
VJ Thorp ◽  
PS Lake
Keyword(s):  
Calcium Carbonate ◽  
Acute Toxicity ◽  
Lethal Concentration ◽  
Total Hardness ◽  
Median Lethal Concentration ◽  
Toxic Unit ◽  
Seasonal Differences ◽  
Freshwater Invertebrates ◽  
Invertebrate Species ◽  
Freshwater Invertebrate

In acute toxicity bioassays with cadmium sulphate at 15� C in soft water (total hardness 10 mg/l as calcium carbonate), the concentrations fatal to 50 % of the test animals were determined for five freshwater invertebrate species. The 96 hr median lethal concentration (LC50) of cadmium was 0.04 mg/l for the amphipod Austrochiltonia subtenuis Sayce, 0.06 mg/l for the shrimp Paratya tasmaniensis Riek, 0.84 mg/l for the ephemeropteran nymph Atalophlebia australis Walker, 250 mg/l for the zygopteran nymph Ischnura heterosticta (Burmeister) and well over 2000 mg/l for a trichopteran larva of the Leptoceridae. The bioassays on Paratya indicared that there may be seasonal differences in sensitivity to cadmium. The 96 hr LC50 for zinc for Paratya was 1.21 mg/l. Zinc and cadmium appeared to interact less than additively at concentrations below 1 toxic unit. Above this concentration, their interaction was strictly additive.

The terrestrial invertebrate fauna of the Svalbard archipelago in a changing world: history of research and challenges

2013 ◽  
Vol 145 (2) ◽  
pp. 131-146 ◽  
Author(s):  
Stephen James Coulson
Keyword(s):  
East Coast ◽  
Rapid Change ◽  
High Arctic ◽  
Invertebrate Fauna ◽  
Svalbard Archipelago ◽  
Scientific Investigations ◽  
Terrestrial Invertebrate ◽  
History Of Research ◽  
Freshwater Invertebrate ◽  
History Of

AbstractThe High Arctic represents a unique environment, an environment from where knowledge is limited and which is currently experiencing rapid change. The archipelago of Svalbard in the European High Arctic possesses a terrestrial and freshwater invertebrate fauna that is distinctive and diverse. However, the majority of studies concentrate on the fauna of the comparatively mild west coast. Very few investigations of the colder east coast exist. Furthermore, scientific investigations are relatively recent. Scientific records of the terrestrial invertebrate fauna begin in the mid-19th century with species inventories and community descriptions but experimental field-based studies and physiological investigations did not commence until the 1980s. Some 570 articles consider this fauna, 54% of which have appeared since 1990. There is hence a dramatic and rapid increase in our understanding, which is not only improving our comprehension of Arctic ecosystem functioning but also providing a baseline for environmental change studies. Due to a largely pristine environment, a political focus and relative ease of logistics, Svalbard is set to become a focus of such studies. This article considers the state of knowledge of the terrestrial and freshwater invertebrate fauna of Svalbard, current research, and discusses the threats to the distinctive communities.

scholarly journals Diving in hot water: a meta-analytic review of how diving vertebrate ectotherms will fare in a warmer world

2021 ◽  
Vol 224 (Suppl 1) ◽  
pp. jeb228213
Author(s):  
Essie M. Rodgers ◽  
Craig E. Franklin ◽  
Daniel W. A. Noble
Keyword(s):  
Climate Warming ◽  
Hot Water ◽  
Effect Of Temperature ◽  
Ectothermic Vertebrate ◽  
Analytic Review ◽  
Significant Difference ◽  
Freshwater Habitats ◽  
Average Water ◽  
Future Warming ◽  
Effects Of Temperature

ABSTRACTDiving ectothermic vertebrates are an important component of many aquatic ecosystems, but the threat of climate warming is particularly salient to this group. Dive durations typically decrease as water temperatures rise; yet, we lack an understanding of whether this trend is apparent in all diving ectotherms and how this group will fare under climate warming. We compiled data from 27 studies on 20 ectothermic vertebrate species to quantify the effect of temperature on dive durations. Using meta-analytic approaches, we show that, on average, dive durations decreased by 11% with every 1°C increase in water temperature. Larger increases in temperature (e.g. +3°C versus +8–9°C) exerted stronger effects on dive durations. Although species that respire bimodally are projected to be more resilient to the effects of temperature on dive durations than purely aerial breathers, we found no significant difference between these groups. Body mass had a weak impact on mean dive durations, with smaller divers being impacted by temperature more strongly. Few studies have examined thermal phenotypic plasticity (N=4) in diving ectotherms, and all report limited plasticity. Average water temperatures in marine and freshwater habitats are projected to increase between 1.5 and 4°C in the next century, and our data suggest that this magnitude of warming could translate to substantial decreases in dive durations, by approximately 16–44%. Together, these data shed light on an overlooked threat to diving ectothermic vertebrates and suggest that time available for underwater activities, such as predator avoidance and foraging, may be shortened under future warming.

scholarly journals Some alien species of aquatic invertebrates in the water bodies of the nature reserve fund of the Kyiv metropolis

2021 ◽  
pp. 175-182
Author(s):  
A. G. Kostenko ◽  
L. P. Gaponova ◽  
M. S. Prokopuk
Keyword(s):  
Alien Species ◽  
Aquatic Invertebrates ◽  
Nature Reserve ◽  
Water Bodies ◽  
Freshwater Invertebrates ◽  
Reserve Fund ◽  
Stable Populations ◽  
Conservation Of Biodiversity

The invasion of alien species of freshwater invertebrates and the associated changes in the faunistic composi- tion of local ecosystems are a serious threat to the conservation of biodiversity. In this work, we supplement the existing list of alien species with information about three more species of non-native freshwater invertebrates, which have formed stable populations in water bodies of Ukraine. These are two representatives of flatworms: Girardia tigrina (Girard, 1850) and Stenostomum saliens Kepner & Carter, 1931, as well as a representative of copepods, Eucyclops roseus Ishida, 1997.

scholarly journals Four new species of Hexanchorus Sharp from Ecuador (Coleoptera, Elmidae) with DNA barcoding and notes on the distribution of the genus

ZooKeys ◽  
2019 ◽  
Vol 838 ◽  
pp. 85-109
Author(s):  
Marek Linský ◽  
Zuzana Čiamporová-Zaťovičová ◽  
Fedor Čiampor Jr
Keyword(s):  
Latin America ◽  
New Species ◽  
Dna Barcoding ◽  
Small Area ◽  
First Record ◽  
Dna Barcodes ◽  
Distribution Map ◽  
Invertebrate Fauna ◽  
Freshwater Invertebrate

The riffle beetle genus Hexanchorus Sharp, 1882 is distributed from Mexico to Argentina, forming an important component of the freshwater invertebrate fauna of Latin America. With 21 described species, Hexanchorus represents one of the most speciose Larainae genera, but its real diversity is likely much higher. We analysed material from a relatively small area in Ecuador, resulting in the first record of H.cordillierae for Ecuador and discovery of four new species and one subspecies: Hexanchorusvirilissp. n., Hexanchorusrostratussp. n., Hexanchorusshepardisp. n., Hexanchorusonoreisp. n. and Hexanchorusonoreisagittatusssp. n. For delimiting and characterizing species, both morphological and molecular (mtCOI DNA barcodes) data were used. A distribution map of Hexanchorus species is provided based on published records.

scholarly journals The Fauna of King Island A guide to identification and conservation management

2005 ◽  
Vol 11 (2) ◽  
pp. 151
Author(s):  
Lesia Turner
Keyword(s):  
Conservation Management ◽  
Invertebrate Fauna ◽  
European Settlement ◽  
Australian Continent ◽  
Freshwater Habitats

The spread of European settlement across the Australian continent has affected not only the faunal and floristic components of the mainland, but has also influenced our island assemblages of native animals. The Fauna of King Island; a guide to identification and conservation management, provides an overview of the history, ecology and conservation management of the King Island fauna. The book discusses both vertebrate and invertebrate fauna for the terrestrial and freshwater habitats of the island and serves as a foundation for identification and management.

scholarly journals Predation of two common native frog species (Litoria ewingi and Crinia signifera) by freshwater invertebrates

2014 ◽  
Vol 62 (6) ◽  
pp. 483 ◽  
Author(s):  
Natasha J. Wilson ◽  
Jamie E. Seymour ◽  
Craig R. Williams
Keyword(s):  
Aquatic Invertebrates ◽  
South Australia ◽  
Aquatic Invertebrate ◽  
Freshwater Crayfish ◽  
Life Stages ◽  
Freshwater Invertebrates ◽  
Invertebrate Predator ◽  
Cherax Destructor ◽  
Invertebrate Predators ◽  
Frog Species

The primary aim of this study was to identify aquatic invertebrate predators of amphibian eggs and tadpoles in an area of South Australia. The presence and abundance of aquatic invertebrates was monitored at four field sites for a period of 5–6 months; this revealed notonectids, freshwater crayfish and odonates to be amongst the most common invertebrate predator types. The ability of these predators to consume eggs and tadpoles of the native Australian frogs Litoria ewingi and Crinia signifera was then investigated. Freshwater crayfish (Cherax destructor) were the most prolific consumers of frog eggs and tadpoles. The notonectid Enithares woodwardi significantly impacted tadpole survivorship for both species while Anisops sp. was less successful at capturing and consuming these tadpoles. Caddisfly nymphs (Lectrides varians and Leptorussa darlingtoni) reduced egg survivorship but not to the same extent as C. destructor. Unlike some predators, which prey upon particular life stages, freshwater crayfish are large, polytrophic omnivores that can act as important predators of both anuran eggs and tadpoles. Given that predation is a key source of mortality in juveniles, identification of likely common predators is useful for understanding the regulation of amphibian populations.

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