T. J. Yates’s research while affiliated with Natural Environment Research Council and other places

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Publications (4)


Population Trends of Common British Butterflies at Monitored Sites
  • Article

February 1995

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27 Reads

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118 Citations

E. Pollard

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D. Moss

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T. J. Yates

1. In recent decades, many of the common and widespread butterflies in Britain which do not already occupy the whole of the country have expanded in range. 2. Populations of the species which have expanded in range, monitored for varying periods during 1974-92 have, overall, shown significantly more increases than declines in abundance, as have the species with ranges which already occupy most of Britain. 3. Nearly all of the common species have increased in abundance more in the east of Britain than in the west. 4. Although the reasons for recent range expansions and increases in abundance of common butterflies are not known, it seems likely that changes in weather have played a role. 5. It is argued that the geographical differences in population trends suggest that a factor (or factors) with a similar eastern bias is also implicated in the changes in abundance and perhaps of range. Some possible factors are discussed briefly.




Citations (4)


... For instance, a recent study has shown that Chrysoperla pallida can display high phenotypic plasticity in metabolic scaling under high temperatures, with a trade-off between body size and mandible size, where larger individuals developed smaller mandibles, which subsequently improved survival during diapause(Álvarez & Ruano, 2024). In addition, few studies assessed the effects of various environmental drivers on life-history processes although it is known that local habitat conditions may mask effects of climate(Musolin & Saulich, 2012;Pollard et al., 1995;Roy et al., 2001). provide an excellent example of how our understanding of the mechanisms that mediate climate-induced changes in invertebrate life-history dynamics is limited. ...

Reference:

Comparative life‐history responses of lacewings to changes in temperature
Population Trends of Common British Butterflies at Monitored Sites
  • Citing Article
  • February 1995

... The need for monitoring to assess biodiversity changes has become apparent since national and international conservation targets were set for example by the Convention on Biological Diversity, the Sustainable Development goals in the UN 2030 Agenda or the International Platform on Biodiversity and Ecosystem Services, to be able to evaluate developments toward these targets (Assembly & Committee, 2003;Cf, 2015;Harrop, 2011;Larigauderie & Mooney, 2010). Monitoring schemes are designed to determine the status of biological diversity and to assess changes over space and time by continuously revisiting sites, and can be used to identify effects of management (Goldsmith, 2012;Pollard et al., 1994). Prior to these systematic and concerted efforts, most knowledge on species populations has been generated without monitoring in mind, but can now serve as valuable benchmarks allowing comparisons over longer time periods. ...

British Butterfly Ecology
  • Citing Article
  • September 1994

... The climate of Delhi ( Figure 2) is extreme with alternating summer heat of 48°C in June and winter chill of 2°C in December ( Figure 2). July-September witnesses heavy to moderate rainfall 19 The butterfly sampling was done using the 'Pollard Walk' method popularized by Pollard and co-workers [20][21][22] , with few modifications. The selection of transects was done in a random stratified manner depending on the area of each site. ...

Changes in butterfly numbers in Britain and The Netherlands, 1990–91
  • Citing Article
  • February 1993

Ecological Entomology

... The sites correspond to different climatic regions including the Subalpine (mean temperature (T) and standard deviation: 9.9 C ± 6.5 C; mean precipitation (P) and standard deviation: 693.8 ± 482 mm; Altitude (A) and standard deviation: 1205.4 ± 380 m) and Mediterranean (T: 16.9 C ± 5.6 C; P: 449.5 ± 399.9 mm; A: 8.7 ± 12.7 m) regions. The characteristics of the management practised in the sampling sites are described in Figure During the surveys, all butterflies within 2.5 m on either side and 5 m in front of the recorder are counted, following the standard procedure outlined by Pollard and Yates (1994). A total of 182 butterfly species were recorded between 1994 and 2021, and all were considered in this study (Data S1). ...

Monitoring Butterflies for Ecology and Conservation
  • Citing Book
  • January 1993