Thursday, 7 July 2016

Monitoring biodiversity on MMU campus

Posted by Simon Valle, Kosta Tzoulas and Stu

As part of its award-winning environmental policy, MMU has committed to enhancing biodiversity on its estate. A first series of exploratory 'bioblitzes' were done by staff, students and local experts in 2015 on the Cheshire Campus and in Ryebank Fields - these yielded very interesting data on the surprising number of species that can live so close to busy urban settlements. This year, we started our monitoring programme, again with the help of consultants at The Environment Partnership and students on the MMU Futures programme. 
Students monitor aquatic plants and invertebrates in the newly created wetland at Birley Fields (Photo: Stu)

Our first step was to set up 20 x 20 m monitoring plots, placed at key places within the All Saints, Birley Fields and MMU Cheshire campuses. We then used standardised methods to record a range of different animal and plant groups within the plots - trees and bushes, terrestrial and aquatic plants, invertebrates such as Ladybirds, lichens, birds, reptiles and mammals). These counts will form the basis of long-term monitoring of biodiversity levels.

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Badgers were 'caught' on several camera traps at the MMU Cheshire campus.

Last year's bioblitz at MMU Cheshire Campus suggested the presence of a badger set, as well as signs of water vole presence (feeding remains, latrines and burrows). In order to confirm this information a number of camera traps were strategically placed as part of this year’s survey effort. Although all evidence suggests that the set may not be in use, the presence of badgers has been documented in several areas of the campus.
 
Camera traps have proved useful to document the presence of other species otherwise difficult to survey (e.g. fox), whereas for more numerous species like rabbits and grey squirrels they provide a useful index of occurrence (i.e. encounter rate) that can be used as a proxy their occurrence over the years. The presence of kingfishers was confirmed along the wetland habitats of MMU Cheshire Campus.
 
Kingfisher, a fantastic bird to have on MMU's estate (Photo: Laitche)

A relatively new UK species of bumblebee, Bombus hypnorum, was recorded both on Birley Fields and Crewe campuses. First recorded in Britain in 2001, this species has been, and still is, rapidly colonising the UK. In Manchester, moth specialist Dr Emma Coulthard has found over 20 individuals of the Diamond-back Moth (Plutella xylostella) which is a migratory species and can come in huge numbers depending on the weather events in the Mediterranean. Vegetation surveys in the Birley Fields showed that, although the campus hosts a limited number of species, it has an impressive structural and micro-habitat variety for an urban environment.

Sampling invertebrates in All Saints Park with the help of Paul Chipman and a ladder (Photo: Stu)
We thank our friends from The Environment Partnership (TEP), MMU staff, MMU's Environment Team for making it possible for us to set up a scientifically rigorous survey framework which will be used in the years to come to monitor species and inform management decisions across MMU's estate.




Friday, 1 July 2016

A new Viper for Europe - already Endangered

Posted by Stu

It is not every day that a new vertebrate is described from Europe. In a new paper published in Journal of Zoological Systematics and Evolutionary Research, Samuele Ghielmi and Michele Menegon (MUSE - Museo delle Scienze, Trento), Lorenzo Laddaga (Museo di Scienze, Domodossola), Sylvain Ursenbacher (University of Basel) and Stu talk about the ‘discovery’, morphology, genetics and conservation of Vipera walser, a new viper species from the north-western Italian Alps.



In 2005, Samuele Ghielmi noticed something odd about adders and lizards in the north-western Italian Alps. First, there was a population of European Adder Vipera berus in the area that was disjunct from V. berus populations in the rest of Europe. More intriguing was that within this area, the Common Lizard Zootoca vivipara, one of the adder’s main prey items over much of its European range, was replaced by Zootoca carniolica, its ancestral oviparous (egg-laying) sister species. This observation sparked a morphological and genetic study which led to the naming of Vipera walser


The beast - variation in individuals of Vipera walser sp. nov. Adult males (left) and adult females (right).

Vipera walser sp. Nov.

The new species is remarkably distinct genetically from both V. berus and other vipers occurring in western Europe. It shows closer affinities to V. darevskii and V. kaznakovi, species occurring in the Caucasus as well as to the widespread Meadow Viper V. ursinii complex. Morphologically, the new species appears to be more similar to V. berus than to its closest relatives occurring in the Caucasus, but can be readily distinguished in most cases by a combination of meristic features such as number of crown, loreal and periocular scales.


Phylogenetic tree showing position of Vipera walser, and relationships with other Vipera species.

Already Endangered

My own main interest in the new viper is in its conservation. The species is extremely range-restricted (< 500 sq. km) and occurs only in two disjunct sites within the high rainfall valleys of the Alps north of Biella. We recommend that the new species should be classified as globally ‘Endangered’ due to its small and fragmented range, and an inferred population decline (Red List criteria B1a/B2a). The other species closely related to walser are also either Endangered (V. kaznakovi) or Critically Endangered (V. darevskii) so the entire clade is in serious danger of being lost.

The new viper appears to be quite common in suitable habitat within its range. We need detailed studies of the species’ precise habitat requirements, to determine how past and current land use changes have affected the species, and how they might be altered to benefit the species in the near future. The species appears to inhabit open areas, often with rocky outcrops, and may not tolerate woodland unless it is very sparse. European mountains experienced a long period of agropastoral expansion from the Late Middle Ages to the 19th century, with large areas of the Alps converted to pasture and heathlands. These open landscapes were presumably beneficial for V. walser. However, the decline in agropastoral activities in the last 100 years and associated afforestation is probably the biggest threat to the species. Other immediate threats are culling and collection of specimens by enthusiasts.


Habitat of Vipera walser sp. nov

Longer term, the ability of V. walser to withstand or adapt to climatic change expected to take place within its range will be crucial. Its current habitat is restricted to just a few valleys, which experience some of the highest rainfall in the Alps. Climate models indicate that in the next 20 years, these valleys will become far wetter and warmer. Research on how the viper might be able to react to climate change is a priority.