WorldCat Identities

Pakeman, Robin J.

Works: 12 works in 12 publications in 1 language and 16 library holdings
Genres: Academic theses 
Roles: Other, Contributor, Author
Classifications: QH343.4, 570
Publication Timeline
Most widely held works by Robin J Pakeman
Phenological changes of the most commonly sampled ground beetle (Coleoptera: Carabidae) species in the UK environmental change network by Gabor Pozsgai( )

1 edition published in 2018 in English and held by 2 WorldCat member libraries worldwide

How to Replicate the Functions and Biodiversity of a Threatened Tree Species? The Case of Fraxinus excelsior in Britain by R. J Mitchell( )

1 edition published in 2016 in English and held by 2 WorldCat member libraries worldwide

Invasion by Rhododendron ponticum depletes the native seed bank with long-term impacts after its removal by J. E Maclean( )

1 edition published in 2017 in English and held by 2 WorldCat member libraries worldwide

Measured estimates of semi-natural terrestrial NPP in Great Britain: comparison with modelled values, and dependence on atmospheric nitrogen deposition by Edward Tipping( )

1 edition published in 2019 in English and held by 2 WorldCat member libraries worldwide

Long-term impacts of nitrogen deposition on coastal plant communities( )

1 edition published in 2016 in English and held by 1 WorldCat member library worldwide

Abstract: Nitrogen deposition has been shown to have significant impacts on a range of vegetation types resulting in eutrophication and species compositional change. Data from a re-survey of 89 coastal sites in Scotland, UK, c. 34 years after the initial survey were examined to assess the degree of change in species composition that could be accounted for by nitrogen deposition. There was an overall increase in the Ellenberg Indicator Value for nitrogen (EIV-N) of 0.15 between the surveys, with a clear shift to species characteristic of more eutrophic situations. This was most evident for Acid grassland, Fixed dune, Heath, Slack and Tall grass mire communities and despite falls in EIV-N for Improved grass, Strand and Wet grassland. The increase in EIV-N was highly correlated to the cumulative deposition between the surveys, and for sites in south-east Scotland, eutrophication impacts appear severe. Unlike other studies, there appears to have been no decline in species richness associated with nitrogen deposition, though losses of species were observed on sites with the very highest levels of SOx deposition. It appears that dune vegetation (specifically Fixed dune) shows evidence of eutrophication above 4.1kgNha −1 yr −1, or 5.92kgNha −1 yr −1 if the lower 95% confidence interval is used. Coastal vegetation appears highly sensitive to nitrogen deposition, and it is suggested that major changes could have occurred prior to the first survey in 1976. Highlights: A re-survey of Scottish coastal habitats was analysed for pollution impacts. Eutrophication impacts in south-east Scotland are severe. Species loss appears more associated with sulphur deposition. Sand dune vegetation appears highly sensitive to nitrogen deposition. Functional changes in the vegetation were apparent above 4.1kgNha −1 yr −1 . Abstract : Coastal habitats are very sensitive to nitrogen deposition and functional changes in vegetation have been significant in more heavily polluted areas
Host identity, climate and nitrogen deposition as determinants of ectomycorrhizal fungal diversity and distribution in Scotland by Peggy Ehrlich( )

1 edition published in 2018 in English and held by 1 WorldCat member library worldwide

Plant functional connectivity - integrating landscape structure and effective dispersal by Alistair G Auffret( )

1 edition published in 2017 in English and held by 1 WorldCat member library worldwide

1. Dispersal is essential for species to survive the threats of habitat destruction and climate change. Combining descriptions of dispersal ability with those of landscape structure, the concept of functional connectivity has been popular for understanding and predicting species' spatial responses to environmental change. 2. Following recent advances, the functional connectivity concept is now able to move beyond landscape structure to consider more explicitly how other external factors such as climate and resources affect species movement. We argue that these factors, in addition to a consideration of the complete dispersal process, are critical for an accurate understanding of functional connectivity for plant species in response to environmental change. 3. We use recent advances in dispersal, landscape and molecular ecology to describe how a range of external factors can influence effective dispersal in plant species, and how the resulting functional connectivity can be assessed. 4. Synthesis. We define plant functional connectivity as the effective dispersal of propagules or pollen among habitat patches in a landscape. Plant functional connectivity is determined by a combination of landscape structure, interactions between plant, environment and dispersal vectors, and the successful establishment of individuals. We hope that this consolidation of recent research will help focus future connectivity research and conservation
Buffering effects of soil seed banks on plant community composition in response to land use and climate by Jan Plue( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

Aim Climate and land use are key determinants of biodiversity, with past and ongoing changes posing serious threats to global ecosystems. Unlike most other organism groups, plant species can possess dormant life-history stages such as soil seed banks, which may help plant communities to resist or at least postpone the detrimental impact of global changes. This study investigates the potential for soil seed banks to achieve this. Location Europe. Time period 1978-2014. Major taxa studied Flowering plants Methods Using a space-for-time/warming approach, we study plant species richness and composition in the herb layer and the soil seed bank in 2,796 community plots from 54 datasets in managed grasslands, forests and intermediate, successional habitats across a climate gradient. Results Soil seed banks held more species than the herb layer, being compositionally similar across habitats. Species richness was lower in forests and successional habitats compared to grasslands, with annual temperature range more important than mean annual temperature for determining richness. Climate and land-use effects were generally less pronounced when plant community richness included seed bank species richness, while there was no clear effect of land use and climate on compositional similarity between the seed bank and the herb layer.Main conclusionsHigh seed bank diversity and compositional similarity between the herb layer and seed bank plant communities may provide a potentially important functional buffer against the impact of ongoing environmental changes on plant communities. This capacity could, however, be threatened by climate warming. Dormant life-history stages can therefore be important sources of diversity in changing environments, potentially underpinning already observed time-lags in plant community responses to global change. However, as soil seed banks themselves appear, albeit less, vulnerable to the same changes, their potential to buffer change can only be temporary, and major community shifts may still be expected
Livestock grazing impacts components of the breeding productivity of a common upland insectivorous passerine Results from a long-term experiment by Lisa E Malm( )

1 edition published in 2020 in English and held by 1 WorldCat member library worldwide

1. The intensity of pastoral management in areas of High Nature Value farming is declining in some regions of Europe but increasing in others. This affects open habitats of conservation concern, such as the British uplands, where bird species that benefit from low-intensity grazing may be most sensitive to such polarization. While experimental manipulations of livestock grazing intensities have improved our understanding of upland breeding bird responses in the short term, none have examined the long-term impacts of altered management on reproductive success. 2. Using a replicated landscape-scale experiment that started in 2003, we investigated the effects of four grazing treatments (intensive sheep; low-intensity sheep; low-intensity mixed sheep and cattle; and no grazing) on the breeding productivity of meadow pipits Anthus pratensis, the most common upland passerine. Surveys were carried out systematically during early (2003 and 2004) and late (2015 and 2016) sampling periods of the experiment to compare the short- and long-term effects of grazing treatments on breeding density and productivity of pipits specifically, but also on the overall bird community. 3. Pipit breeding density was lowest under low-intensity sheep grazing while the highest egg-stage nest survival was observed in the same treatment, although no significant treatment effects were detected on overall nest survival or fledgling output. There were no significant differences in treatment effects between the sampling periods on any breeding variable, but overall nest survival was lower in the later sampling period across all treatments. 4. Breeding bird species richness differed between treatments in the later sampling period, with highest species richness in the ungrazed treatment. 5. Synthesis and applications . Livestock grazing management can have different outcomes for different upland birds. Our results showed that, with time, meadow pipit breeding productivity tended to be higher when sheep grazing intensity was reduced and/or mixed with cattle, and lower when livestock were removed, but not significantly so. Removal of grazing, however, can significantly increase bird species richness. The long-term experiment showed an overall decline in fledglings regardless of grazing treatments, potentially a result of increased predator numbers harboured by nearby developing woodland, highlighting the importance of considering wider landscape processes in grazing management decisions
Mineral nutrition of strandline annuals by R. J Pakeman( Book )

1 edition published in 1990 in English and held by 0 WorldCat member libraries worldwide

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Alternative Names
Pakeman, Robin J.

English (12)