scholarly journals Multiple drivers of decline in the global status of freshwater crayfish (Decapoda: Astacidea)

2015 ◽  
Vol 370 (1662) ◽  
pp. 20140060 ◽  
Author(s):  
Nadia I. Richman ◽  
Monika Böhm ◽  
Susan B. Adams ◽  
Fernando Alvarez ◽  
Elizabeth A. Bergey ◽  
...  
Keyword(s):  
Threatened Species ◽  
Extinction Risk ◽  
Conservation Status ◽  
Biodiversity Loss ◽  
Freshwater Ecosystems ◽  
Freshwater Crayfish ◽  
Freshwater Biodiversity ◽  
Face Threats ◽  
Global Status ◽  
Alternative Means

Rates of biodiversity loss are higher in freshwater ecosystems than in most terrestrial or marine ecosystems, making freshwater conservation a priority. However, prioritization methods are impeded by insufficient knowledge on the distribution and conservation status of freshwater taxa, particularly invertebrates. We evaluated the extinction risk of the world's 590 freshwater crayfish species using the IUCN Categories and Criteria and found 32% of all species are threatened with extinction. The level of extinction risk differed between families, with proportionally more threatened species in the Parastacidae and Astacidae than in the Cambaridae. Four described species were Extinct and 21% were assessed as Data Deficient. There was geographical variation in the dominant threats affecting the main centres of crayfish diversity. The majority of threatened US and Mexican species face threats associated with urban development, pollution, damming and water management. Conversely, the majority of Australian threatened species are affected by climate change, harvesting, agriculture and invasive species. Only a small proportion of crayfish are found within the boundaries of protected areas, suggesting that alternative means of long-term protection will be required. Our study highlights many of the significant challenges yet to come for freshwater biodiversity unless conservation planning shifts from a reactive to proactive approach.

scholarly journals Global extinction risk for seahorses, pipefishes and their near relatives (Syngnathiformes)

Oryx ◽  
2021 ◽  
pp. 1-10
Author(s):  
Riley A. Pollom ◽  
Gina M. Ralph ◽  
Caroline M. Pollock ◽  
Amanda C.J. Vincent
Keyword(s):  
Threatened Species ◽  
Habitat Degradation ◽  
Extinction Risk ◽  
Conservation Status ◽  
Field Research ◽  
Selective Extraction ◽  
Iucn Red List ◽  
Point Estimate ◽  
Conservation Action ◽  
Data Deficient

Abstract Few marine taxa have been comprehensively assessed for their conservation status, despite heavy pressures from fishing, habitat degradation and climate change. Here we report on the first global assessment of extinction risk for 300 species of syngnathiform fishes known as of 2017, using the IUCN Red List criteria. This order of bony teleosts is dominated by seahorses, pipefishes and seadragons (family Syngnathidae). It also includes trumpetfishes (Aulostomidae), shrimpfishes (Centriscidae), cornetfishes (Fistulariidae) and ghost pipefishes (Solenostomidae). At least 6% are threatened, but data suggest a mid-point estimate of 7.9% and an upper bound of 38%. Most of the threatened species are seahorses (Hippocampus spp.: 14/42 species, with an additional 17 that are Data Deficient) or freshwater pipefishes of the genus Microphis (2/18 species, with seven additional that are Data Deficient). Two species are Near Threatened. Nearly one-third of syngnathiformes (97 species) are Data Deficient and could potentially be threatened, requiring further field research and evaluation. Most species (61%) were, however, evaluated as Least Concern. Primary threats to syngnathids are (1) overexploitation, primarily by non-selective fisheries, for which most assessments were determined by criterion A (Hippocampus) and/or (2) habitat loss and degradation, for which assessments were determined by criterion B (Microphis and some Hippocampus). Threatened species occurred in most regions but more are found in East and South-east Asia and in South African estuaries. Vital conservation action for syngnathids, including constraining fisheries, particularly non-selective extraction, and habitat protection and rehabilitation, will benefit many other aquatic species.

scholarly journals Conservation Status of Marine Biodiversity in Oceania: An Analysis of Marine Species on the IUCN Red List of Threatened Species

2011 ◽  
Vol 2011 ◽  
pp. 1-14 ◽  
Author(s):  
Beth A. Polidoro ◽  
Cristiane T. Elfes ◽  
Jonnell C. Sanciangco ◽  
Helen Pippard ◽  
Kent E. Carpenter
Keyword(s):  
Threatened Species ◽  
Environmental Changes ◽  
Extinction Risk ◽  
Conservation Status ◽  
Marine Species ◽  
Iucn Red List ◽  
Red List ◽  
Marine Biodiversity ◽  
Conservation Priorities ◽  
Conservation Action

Given the economic and cultural dependence on the marine environment in Oceania and a rapidly expanding human population, many marine species populations are in decline and may be vulnerable to extinction from a number of local and regional threats. IUCN Red List assessments, a widely used system for quantifying threats to species and assessing species extinction risk, have been completed for 1190 marine species in Oceania to date, including all known species of corals, mangroves, seagrasses, sea snakes, marine mammals, sea birds, sea turtles, sharks, and rays present in Oceania, plus all species in five important perciform fish groups. Many of the species in these groups are threatened by the modification or destruction of coastal habitats, overfishing from direct or indirect exploitation, pollution, and other ecological or environmental changes associated with climate change. Spatial analyses of threatened species highlight priority areas for both site- and species-specific conservation action. Although increased knowledge and use of newly available IUCN Red List assessments for marine species can greatly improve conservation priorities for marine species in Oceania, many important fish groups are still in urgent need of assessment.

scholarly journals Decline of the Tucumán parrot Amazona tucumana in Argentina: present status and conservation needs

Oryx ◽  
2007 ◽  
Vol 41 (1) ◽  
pp. 101-105 ◽  
Author(s):  
Luis Rivera ◽  
Natalia Politi ◽  
Enrique H. Bucher
Keyword(s):  
Threatened Species ◽  
Present Status ◽  
Conservation Status ◽  
Restricted Range ◽  
Research Needs ◽  
Detailed Review ◽  
New Localities ◽  
Global Status ◽  
Available Information ◽  
Near Threatened

The Tucumán parrot Amazona tucumana is a rare, Near Threatened species on CITES Appendix I with a restricted range in the tropical and subtropical montane forests of Argentina and Bolivia. We assessed the conservation status of the species in Argentina based on a detailed review of available information and an extensive survey throughout its range. A total of 6,015 individuals were detected in 14 sites, eight of which are new localities. The total number recorded in this study represents less than a third of the number exported from Argentina between 1985 and 1989 (18,641), indicating a significant reduction in population size. Research needs to be extended to additional sites, especially in Bolivia, to assess further the global status of the species, and high priority given to the creation of state and private reserves for the species.

scholarly journals Bending the Curve of Global Freshwater Biodiversity Loss: An Emergency Recovery Plan

BioScience ◽  
2020 ◽  
Vol 70 (4) ◽  
pp. 330-342 ◽  
Author(s):  
David Tickner ◽  
Jeffrey J Opperman ◽  
Robin Abell ◽  
Mike Acreman ◽  
Angela H Arthington ◽  
...  
Keyword(s):  
Biological Diversity ◽  
Environmental Flows ◽  
Biodiversity Loss ◽  
Freshwater Ecosystems ◽  
Convention On Biological Diversity ◽  
Freshwater Ecosystem ◽  
Freshwater Biodiversity ◽  
The Sustainable Development ◽  
Recovery Plan ◽  
Species Invasions

Abstract Despite their limited spatial extent, freshwater ecosystems host remarkable biodiversity, including one-third of all vertebrate species. This biodiversity is declining dramatically: Globally, wetlands are vanishing three times faster than forests, and freshwater vertebrate populations have fallen more than twice as steeply as terrestrial or marine populations. Threats to freshwater biodiversity are well documented but coordinated action to reverse the decline is lacking. We present an Emergency Recovery Plan to bend the curve of freshwater biodiversity loss. Priority actions include accelerating implementation of environmental flows; improving water quality; protecting and restoring critical habitats; managing the exploitation of freshwater ecosystem resources, especially species and riverine aggregates; preventing and controlling nonnative species invasions; and safeguarding and restoring river connectivity. We recommend adjustments to targets and indicators for the Convention on Biological Diversity and the Sustainable Development Goals and roles for national and international state and nonstate actors.

scholarly journals The conservation status of birds in Laos: a review of key species

1998 ◽  
Vol 8 (S1) ◽  
pp. 1-159 ◽  
Author(s):  
R. M. Thewlis ◽  
R. J. Timmins ◽  
T. D. Evans ◽  
J. W. Duckworth
Keyword(s):  
Threatened Species ◽  
Conservation Status ◽  
Bird Conservation ◽  
Additional Species ◽  
Key Species ◽  
The Status ◽  
Global Status ◽  
Conservation Concern ◽  
First Time ◽  
Near Threatened

SummaryLaos is an important country for bird conservation. Bird surveys between 1992 and 1996, the first since 1949, covered 20 main areas, with incidental records from many others.This paper reviews the status of all Lao species reported to be of elevated conservation concern (key species) in any of the following categories: Globally Threatened or Globally Near-Threatened (sensu Collar and Andrew 1988 and Collar et al. 1994), and At Risk or Rare in Thailand (sensu Round 1988 and Treesucon and Round 1990). Several additional species are covered which have clearly undergone a National Historical Decline in Laos. A comprehensive review of other Lao species was not possible, and some species which are in truth of conservation concern have doubtless been overlooked. Historical and modern records were reviewed and population trends identified where possible.Current global status listings (Collar et al. 1994) were supported, except that consideration should be given to changing Red-collared Woodpecker Picus rabieri and Sooty Babbler Stachyris herberti from Threatened to Near-Threatened. If the Lao situation is representative of the species throughout their range, then consideration should also be given to placing Ratchet-tailed Treepie Temnurus temnurus and River Lapwing Vanellus duvaucelii as Near-Threatened.Twenty-seven Globally Threatened species are known from Laos, of which there are recent records of 22. There are recent unconfirmed records of two more. Forty-seven Globally Near-Threatened species are known from Laos, of which there are recent records of 39; there are unconfirmed records of one further species. Five Globally Threatened and five Near-Threatened species were recorded for the first time in Laos in recent years, suggesting that further species of elevated conservation concern remain to be found.

scholarly journals Monitoring Extinction Risk and Threats of the World’s Fishes based on the Sampled Red List Index

2020 ◽  
Author(s):  
Rafael Miranda ◽  
Imanol Miqueleiz ◽  
William Darwall ◽  
Catherine Sayer ◽  
Nicholas Dulvy ◽  
...  
Keyword(s):  
Extinction Risk ◽  
Conservation Status ◽  
Marine Species ◽  
Freshwater Ecosystems ◽  
Red List ◽  
Species At Risk ◽  
Marine Systems ◽  
Species Groups ◽  
Global Biodiversity ◽  
Over Time

Abstract Global biodiversity targets require us to identify species at risk of extinction and quantify status and trends of biodiversity. The Red List Index (RLI) tracks trends in the conservation status of entire species groups over time by monitoring changes in categories assigned to species. Here, we calculate this index for the world’s fishes in 2010, using a sampled approach to the RLI based on a randomly selected sample of 1,500 species, and also present RLI splits for freshwater and marine systems separately. We further compare specific traits of a worldwide fish list to our sample to assess its representativeness. Overall, 15.1% of species in the sample were estimated to be threatened with extinction, resulting in an sampled RLI of 0.914 for all species, 0.972 in marine and 0.860 in freshwater ecosystems. Our sample showed fishing as the principal threat for marine species, and pollution by agricultural and foresty effluents for freshwater fishes. The sampled list provides a robust representation for tracking trends in the conservation status of the world’s fishes, including disaggregated sampled indices for marine and freshwater fish. Reassessment and backcasting of this index is urgent to check the achievement of the commitments proposed in global biodiversity targets.

scholarly journals A National assessment of aichi biodiversity target 12 – an international conservation initiative

2019 ◽  
Vol 4 (5) ◽  
Author(s):  
Kirandeep K Dhami
Keyword(s):  
Threatened Species ◽  
Biological Diversity ◽  
Extinction Risk ◽  
Conservation Status ◽  
Population Decline ◽  
National Assessment ◽  
The Status ◽  
Aichi Biodiversity Targets ◽  
Conservation Plans ◽  
Taking Action

The Aichi Biodiversity targets are a set of twenty targets for the Convention of Biological Diversity (CBD) that were developed with the intention to help each participating country to measure the progress made in preventing the loss of biological diversity. These targets provide a 10-year period for taking action by the countries. These targets setup in 2010 are expected to be achieved within 2020 by all the 193 countries signatory to CBD. Aichi Biodiversity Target 12 is considered to be one of the most important targets, which is directly or indirectly linked to all of the other 19 CBD Targets. Aichi-12 sets up the goal for each country to prevent the extinction of known threatened species and improve the conservation status of those species that are on decline. This target calls for establishment of conservation plans for species that face a high risk to extinction. Hence, it is of urgent need to understand the extinction risk posed to each of the threatened species in the country and the factors that are responsible for the population decline in species. Therefore, it is important for taking initiatives to remove/reduce those factors posing risk to the survival of species. This study presents a brief overview of the status and progress made by India towards achievement of Aichi-12.

Classifying threatened species: means and ends

1994 ◽  
Vol 344 (1307) ◽  
pp. 91-97 ◽  
Keyword(s):  
Threatened Species ◽  
Extinction Risk ◽  
Conservation Status ◽  
Species Conservation ◽  
Conservation Priorities ◽  
Extinction Rate ◽  
Sources Of Information ◽  
Means And Ends ◽  
Species Area ◽  
Taxonomic Groups

Threatened species lists are widely consulted as sources of information on the conservation status of species. However, their application to planning for conservation is limited because they have not been developed systematically, and because the criteria used to judge extinction risk are subjective. Recently, new proposals have been made to increase the broader usefulness of these lists, and some elements of these proposals are reviewed here. Apart from indicating the geographical and taxonomic groups containing most threatened species, these lists can provide other kinds of information. Some data from threatened species classifications using quantitative criteria provide a new method for estimating extinction rates in a variety of vertebrate taxa. This analysis suggests that over the next 100 years, the extinction rate could be as high as 15-20% in these groups. These values are comparable to those based upon extrapolations from species-area curves. However, allocating threatened species categories is only a first step towards developing rational systems for setting conservation priorities. These systems will need to consider a quite different set of variables, including those for incorporating species conservation priorities in area-based planning

scholarly journals Conservation of terrestrial invertebrates: a review of IUCN and regional Red Lists for Myriapoda

ZooKeys ◽  
2020 ◽  
Vol 930 ◽  
pp. 221-229
Author(s):  
Manoela Karam-Gemael ◽  
Peter Decker ◽  
Pavel Stoev ◽  
Marinez I. Marques ◽  
Amazonas Chagas Jr
Keyword(s):  
Threatened Species ◽  
Extinction Risk ◽  
Conservation Status ◽  
Iucn Red List ◽  
Red List ◽  
Current Conservation ◽  
Terrestrial Invertebrates ◽  
Red Lists ◽  
Limit Protection ◽  
Regional Red Lists

Red Listing of Threatened species is recognized as the most objective approach for evaluating extinction risk of living organisms which can be applied at global or national scales. Invertebrates account for nearly 97% of all animals on the planet but are insufficiently represented in the IUCN Red Lists at both scales. To analyze the occurrence of species present in regional Red Lists, accounts of 48 different countries and regions all over the world were consulted and all data about myriapods (Myriapoda) ever assessed in Red Lists at any level assembled. Myriapod species assessments were found in eleven regional Red Lists; however, no overlap between the species included in the global IUCN Red List and the regional ones was established. This means that myriapod species considered threatened at regional level may not be eligible for international funding specific for protection of native threatened species (more than US$ 25 million were available in the last decade) as most financial instruments tend to support only threatened species included in the IUCN Red List. As the lack of financial resources may limit protection for species in risk of extinction, it is urgent to increase the possibilities of getting financial support for implementation of measures for their protection. A Red List of all Myriapoda species recorded in Red Lists at national or local (596) and global (210) scales totaling 806 species is presented. This list shows for the first time an overview of the current conservation status of Myriapoda species. Here, the urgent need of establishing a Myriapoda Specialist Group in the Species Survival Commission of IUCN is also stressed.

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