Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Flagship species could help protect freshwaters

26.10.2017

Researchers at the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB) and the International Union for the Conservation of Nature (IUCN) are investigating which animal species could become the focus of conservation measures as “imposing” flagship species in order to halt the decline of species and habitats in freshwaters. The current study emphasises how legitimate this flagship approach is: 83 per cent of all the world’s threatened freshwater species occur in the same areas as the “imposing” freshwater species examined within the study. However, almost 60 per cent of these potential flagship species are themselves already on the Red List of Threatened Species.

About one third of all animal species around the world are threatened. But even so, it is mainly the imposing, large terrestrial and marine animals such as panda bears, elephants, polar bears and whales that are perceived by the general public as being worthy of protection. And yet the decline in freshwater species is occurring more rapidly than in their popular land-dwelling and ocean-dwelling counterparts.


The hippopotamus (Hippopotamus amphibius) is one of the 132 imposing freshwater species examined that have the potential to become a flagship species.

Photo: Pixabay


As one of the largest freshwater fishes worldwide the South-American Arapaima (Arapaima gigas) is one of the most impressive candidates to fulfil the role of a true "freshwater panda".

Photo: David Ausserhofer / IGB

Imposing creatures with ambassador potential: hippos, crocodiles, sturgeons et al.

Together with her team of international researchers, IGB researcher Dr. Sonja Jähnig, co-author of the study, selected 132 examples of “imposing” large freshwater species weighing at least 30 kilos in adulthood for their study.

“Hippos, river dolphins, crocodiles, freshwater turtles and large species of fish such as sturgeons and salmon have the potential to raise public, scientific and, above all, political awareness of species loss and the attendant problems in freshwaters,” summarises Sonja Jähnig the study’s perspective.

Mapping flagship species

The researchers have mapped the occurrence of the selected species. The resulting maps show that 83 per cent of all the world’s threatened freshwater species occur in the same areas as the large freshwater species under investigation – all of which are potential ambassadors for their ecosystem. If, then, efficient protective measures for these flagship species can be identified, the habitats of numerous other smaller species could be preserved at the same time.

Protegee devoid of protected areas

Human exploitation poses a serious threat to large freshwater species: 94 per cent of the animal species under investigation suffer from over-exploitation, such as being decimated by hunting and fishing at a faster rate than stocks are able to recover. 65 percent are threatened as a result of interventions in habitats, usually due to the construction of dams, and 54 per cent suffer from pollution caused by agricultural, industrial or domestic wastewater discharges.

However, 84 per cent of the range of distribution of the 132 animal species under investigation is outside protected areas. The fact that many of these large species live in large rivers, lakes and wetlands makes conservation efforts all the more difficult, explains Dr. William Darwall, Head of the IUCN Global Species Programmes’ Freshwater Biodiversity Unit and a member of the team: “These freshwater ecosystems are highly interconnected such that the species within them and the threats to those species may travel long distances often beyond the boundaries of any protected areas.“

In order to protect these animal species – and, at the same time, entire ecosystems – local protection zones, such as for spawning and breeding sites, must be combined with large-scale landscape measures operating at the scale of the river or lake catchment, taking into account the species’ migration routes, for instance. And, above all, the exploitation of these animals and the overuse of their habitats must be curbed.

Study:

Savrina F. Carrizo, Sonja C. Jähnig, Vanessa Bremerich, Jörg Freyhof, Ian Harrison, Fengzhi He, Simone D. Langhans, Klement Tockner, Christiane Zarfl, William Darwall (2017) Freshwater Megafauna: Flagships for Freshwater Biodiversity under Threat. BioScience, Volume 67, Issue 10, 1 October 2017, Pages 919–927

Read the Studie Open Access on BioScience > https://doi.org/10.1093/biosci/bix099

Contact:

Dr. Sonja Jähnig, Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB), Dept. Ecosystem Research, sonja.jaehnig@igb-berlin.de, +49 (0) 30 6392 4085

About the Leibniz-Institute of Freshwater Ecology and Inland Fisheries (IGB):

Work at IGB combines basic research with preventive research as a basis for the sustainable management of freshwaters. In the process, IGB explores the structure and function of aquatic ecosystems under near-natural conditions and under the effect of multiple stressors. Its key research activities include the long-term development of lakes, rivers and wetlands under rapidly changing global, regional and local environmental conditions, the development of coupled ecological and socio-economic models, the renaturation of ecosystems, and the biodiversity of aquatic habitats. Work is conducted in close cooperation with universities and research institutions from the Berlin/Brandenburg region as well as worldwide. IGB is a member of the Forschungsverbund Berlin e.V., an association of eight research institutes of natural sciences, life sciences and environmental sciences in Berlin. The institutes are members of the Leibniz Association. http://www.igb-berlin.de/en

Weitere Informationen:

https://freshwaterblog.net/2017/10/10/freshwater-megafauna-as-conservation-flags... > Presentation of the study on the Freshwater Blog – the freshwater biodiversity blog
http://www.igb-berlin.de/en/news/seeking-freshwater-pandas > More information about the concept of flagship species
http://www.igb-berlin.de/en/news/endangered-giants-large-freshwater-species-amon... > Background information on the endangerment of large freshwater species

Katharina Bunk | idw - Informationsdienst Wissenschaft

More articles from Ecology, The Environment and Conservation:

nachricht Cities can cut greenhouse gas emissions far beyond their urban borders
07.11.2017 | Potsdam-Institut für Klimafolgenforschung

nachricht Reducing manure and fertilizers decreases atmospheric fine particles
30.10.2017 | Max-Planck-Institut für Chemie

All articles from Ecology, The Environment and Conservation >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Novel Nano-CT device creates high-resolution 3D-X-rays of tiny velvet worm legs

Computer Tomography (CT) is a standard procedure in hospitals, but so far, the technology has not been suitable for imaging extremely small objects. In PNAS, a team from the Technical University of Munich (TUM) describes a Nano-CT device that creates three-dimensional x-ray images at resolutions up to 100 nanometers. The first test application: Together with colleagues from the University of Kassel and Helmholtz-Zentrum Geesthacht the researchers analyzed the locomotory system of a velvet worm.

During a CT analysis, the object under investigation is x-rayed and a detector measures the respective amount of radiation absorbed from various angles....

Im Focus: Researchers Develop Data Bus for Quantum Computer

The quantum world is fragile; error correction codes are needed to protect the information stored in a quantum object from the deteriorating effects of noise. Quantum physicists in Innsbruck have developed a protocol to pass quantum information between differently encoded building blocks of a future quantum computer, such as processors and memories. Scientists may use this protocol in the future to build a data bus for quantum computers. The researchers have published their work in the journal Nature Communications.

Future quantum computers will be able to solve problems where conventional computers fail today. We are still far away from any large-scale implementation,...

Im Focus: Wrinkles give heat a jolt in pillared graphene

Rice University researchers test 3-D carbon nanostructures' thermal transport abilities

Pillared graphene would transfer heat better if the theoretical material had a few asymmetric junctions that caused wrinkles, according to Rice University...

Im Focus: Support Free with “TwoCure” – Innovation in Resin-Based 3D Printing

The Fraunhofer Institute for Laser Technology ILT and Rapid Shape GmbH are working together to further develop resin-based 3D printing. The new “TwoCure” process requires no support structures and is significantly more efficient and productive than conventional 3D printing techniques for plastic components. Experts from Fraunhofer ILT will be presenting the state-funded joint development that makes use of the interaction of light and cold in forming the components at formnext 2017 from November 14 to 17 in Frankfurt am Main.

Much like stereolithography, one of the best-known processes for printing 3D plastic components works using photolithographic light exposure that causes liquid...

Im Focus: Researchers develop chip-scale optical abacus

A team of researchers led by Prof. Wolfram Pernice from the Institute of Physics at Münster University has developed a miniature abacus on a microchip which calculates using light signals. With it they are paving the way to the development of new types of computer in which, as in the human brain, the computing and storage functions are combined in one element.

Researchers at the universities of Münster, Exeter and Oxford have developed a miniature “abacus” which can be used for calculating with light signals. With it...

All Focus news of the innovation-report >>>

Anzeige

Anzeige

Event News

#Berlin5GWeek: The right network for Industry 4.0

30.10.2017 | Event News

3rd Symposium on Driving Simulation

23.10.2017 | Event News

ASEAN Member States discuss the future role of renewable energy

17.10.2017 | Event News

 
Latest News

Need entangled atoms? Get 'Em FAST! with NIST's new patent-pending method

08.11.2017 | Physics and Astronomy

New approach uses light instead of robots to assemble electronic components

08.11.2017 | Information Technology

Tracking down the origins of gold

08.11.2017 | Awards Funding

VideoLinks
B2B-VideoLinks
More VideoLinks >>>