Navigation Links
Spiders suffer from human impact

Researchers from the King Juan Carlos University (URJC) have carried out a research study published in Biological Conservation, which looked at whether spiders were more tolerant of human impact than other animals. The answer was no: arachnids suffer the consequences of changes to their landscape just like any other animal.

"The abundance and number of spider species is negatively affected by the impact of many human land uses, such as habitat fragmentation, fire and pesticides", Samuel Prieto-Bentez and Marcos Mndez, researchers at the URJC Biodiversity and Conservation Department, tell SINC.

Given the "scarcity" of threatened spiders on the Red Lists, which are very in vogue at the moment, the researchers tried to find out whether spiders are exempt from the risks caused by human action, by means of a meta-study of a total of 173 scientific papers published since 1980, which provide more generalizable data.

"The technique used meant we could rigorously combine the results of a lot of studies. This is regularly used in medicine in order to arrive at general conclusions about the effects of drugs, based on numerous trials with more limited coverage", say Prieto-Bentez and Mndez, who studied the human impact in three ecosystems: farmland, pasture and woodland.

Until now, fewer than 20% of studies had indicated any negative effects of human impact on arachnids. The study, which has been published in Biological Conservation, demonstrates "evident" damaging effects on spider numbers due to the use of soil in farming and pasture systems. "In woodlands this was not so clear", the study explains.

Growing threats

In farming and pasture ecosystems all over world, fires, sheep-grazing and conventional crops have a harmful effect on arachnid fauna because they cause extreme changes to the vegetation structure. Spider abundance is affected in woodland by habitat fragmentation.

Insecticides also have a negative effect on spider diversity in agricultural and pasture ecosystems. The researchers show in the study that organic farming is more beneficial to arachnid abundance than conventional agriculture, but that these effects depend on the complexity of the landscape.

The study proposes some solutions for spider conservation. A reduction in mechanical alterations to the land, such as harvesting, ploughing and grazing would increase spider diversity in agricultural and pastural ecosystems. In addition, the use of insecticides should be more controlled, as in organic farming, and habitat fragmentation should be avoided.

According to the authors, although "they do not enjoy an excessive level of public sympathy", spiders are an important animal group for humans, since they free us of a large number of pest insects and are "very important" predators in the functioning of natural systems.


Contact: SINC Team
FECYT - Spanish Foundation for Science and Technology

Related biology news :

1. Mysterious purse-web spiders rediscovered and photographed in South Africa
2. When food is scarce, hungry female spiders alter mating preferences
3. Spiders adjust courtship signals for maximum effect
4. Dracula orchids and goblin spiders
5. Study: Crickets forewarn unborn babies about spiders
6. Male Australian redback spiders employ courtship strategies to preserve their life
7. Scary ancient spiders revealed in 3-D models, thanks to new imaging technique
8. New species of spiders discovered by UBC scientist in Papua New Guinea
9. Moving in for the winter toxic brown recluse spiders pose danger
10. Injectable gel could spell relief for arthritis sufferers
11. 1 in 3 women suffer post-sex blues
Post Your Comments:
Related Image:
Spiders suffer from human impact
(Date:11/9/2015)... Nov. 09, 2015 ... of the "Global Law Enforcement Biometrics ... --> ) has announced ... Enforcement Biometrics Market 2015-2019" report to ... Markets ( ) has announced the ...
(Date:10/29/2015)... Minn. , Oct. 29, 2015   MedNet ... supports the entire spectrum of clinical research, is pleased ... Minnesota High Tech Association (MHTA) as one of only ... in the "Software – Small and Growing" category. The Tekne ... individuals who have shown superior technology innovation and leadership. ...
(Date:10/29/2015)... 29, 2015  Connected health pioneer, Joseph C. ... of technology-enabled health and wellness, and the business opportunities ... The Internet of Healthy Things . Long ... even existed, Dr. Kvedar, vice president, Connected Health, Partners ... delivery, moving care from the hospital or doctor,s office ...
Breaking Biology News(10 mins):
(Date:11/24/2015)... Malaysia , Nov. 24, 2015  Asia-Pacific ... contract research organisation (CRO) market. The trend of ... in lower margins but higher volume share for ... capacity and scale, however, margins in the CRO ... Organisation (CRO) Market ( ), finds ...
(Date:11/24/2015)... SUNNYVALE, Calif. , Nov. 24, 2015 ... executives will be speaking at the following conference, and ... New York, NY      Tuesday, December 1, ... New York, NY      Tuesday, December 1, ...      Piper Jaffray Healthcare Conference, New York, NY ...
(Date:11/24/2015)... , Nov. 24, 2015 /CNW/ - iCo Therapeutics ("iCo" ... reported financial results for the quarter ended September ... in Canadian dollars and presented under International Financial ... States ," said Andrew Rae , ... regarding iCo-008 are not only value enriching for ...
(Date:11/24/2015)... ... November 24, 2015 , ... International Society for Pharmaceutical Engineering ... premier annual events for pharmaceutical manufacturing: 2015 Annual Meeting. The conference took place ... the largest number of attendees in more than a decade. , “The ...
Breaking Biology Technology: