Farming the Iveragh uplands: A tale of humans and nature

The rugged beauty of the Iveragh peninsula has fascinated many a passing visitor and never fails to make some of us linger or stay for good. For those who need proof of the area’s uniqueness, a variety of national and European designations provide ample attestation of the splendour of Iveragh’s scenery, the diversity of its landscape and its heritage. Being surrounded on three sides by the Atlantic, Iveragh is the largest and most geographically isolated peninsula in Ireland whose western extremity, the Great Skellig, forms the westernmost point of Europe. Despite its maritime location, Iveragh’s character is fundamentally determined by the mountains, valleys and streams that form the peninsula’s interior—the bequest of a landscape sculpted by ice thousands of years ago (Crowley and Sheehan, 2009). Distinctive mountain scene in the Bridia Valley, Glencar Perhaps most distinctive, however, are the extensive blanket bogs and upland heather moorlands that cover most of the peninsula and captivate the imagination with the wild and austere appeal of an area where life did not change much for man and beast until relatively recently. Having come into existence in the wake of woodland clearances, the cutting of vegetation for fuel and the harvesting of crops for food and fiber by Neolithic farmers in the first and second millennium BC, this unique cultural landscape continues to be managed by traditional farmers and their animals to the present day. The value of areas such as Iveragh as repositories of a unique flora and fauna has long been recognized, but they have entered a period of major transformation as the agricultural economy that lay behind them no longer exists (Webb, 1998). The single largest danger is that farming communities may not survive the present discussion of how competitive European agriculture should be, as under present market conditions they are unable to compete without fundamentally changing their way of farming (Luick, 1998). The last 10 years have seen a growing debate over the future of areas like the Iveragh peninsula that may be ‘marginal’ in agricultural terms, but that are quite essential to life in Europe as we know and cherish it. Upland farmed landscapes provide clean water, maintain a rich plant and animal life and help to keep families in regions that offer few alternative employment opportunities – at the same time as attracting millions of tourists each year. The Caragh in Glencar—one of Europe’s cleanest rivers. Such areas, also termed high nature value farmland, cover about 25% of all agricultural land in Ireland and include, besides Iveragh, other parts of Kerry, Connemara, Mayo, Donegal, the Comeraghs, Wicklow, the Burren and the offshore Islands. The farming systems of these areas are characterised by extensive mixed livestock grazing and little agro-chemical inputs combined with labour-intensive management practices. Without dedicated farmers and their families, the character of these areas would change completely leading to the disappearance of unique cultural landscapes with effects such as rural depopulation and the loss of local communities. Already farming systems have changed substantially with livestock being concentrated on better quality land while marginal areas are being abandoned. Along with this, there are changes in the animals being farmed. The traditional Scotch Blackface sheep are increasingly crossed with or replaced by lowland breeds to satisfy market demands for heavy lamb. This has led to a softening in sheep and the fear among farmers that the traditional grazers of the uplands may be extinct in years to come. Going, too, is the use of the native rustic Kerry cow that grazed the rough Farming the Iveragh Uplands grasses, bracken, gorse and soft rushes in the winter - growth that sheep cannot control. Unsurprisingly, this disruption over a relatively short time, in what was formerly a sustainable relationship between farming and nature, will have implications for the area’s flora and fauna. Some of the repercussions are obvious; others need to be researched in more depth if appropriate solutions are to be formulated. It is now a stated objective of EU environment and rural development policy to maintain and conserve traditional farming systems like the one practised on Iveragh. Beyond acknowledging the importance of traditional farming for nature conservation and local livelihoods, it is necessary to understand how such farming systems function and to determine how the inevitable process of change can be redirected to provide a way of life that is socially and economically rewarding for farm families while preserving the farming practices necessary for Iveragh’s unique landscape to persist into the future. In this light, University College Cork (UCC) in conjunction with the Environmental Research Institute (ERI) and funded by Science Foundation Ireland (SFI) initiated BioUp, a 3 year research programme to investigate the upland farming system and rich biodiversity associated with it. Managing rural change in the uplands calls for the active involvement of many stakeholders, including farmers and agricultural advisory groups, land owners, conservation groups, forestry, tourism, and local authorities. In the BioUp project, researchers and stakeholders worked closely together. It is hoped that this will help to obtain a better understanding of the social, economic and environmental challenges facing Iveragh and promote greater public appreciation of the indispensable contributions made by farm families to maintaining our unique heritage - a service that has gone unappreciated too long

On the context-dependent scaling of consumer feeding rates

The stability of consumer-resource systems can depend on the form of feeding interactions (i.e. functional responses). Size-based models predict interactions - and thus stability - based on consumer-resource size ratios. However, little is known about how interaction contexts (e.g. simple or complex habitats) might alter scaling relationships. Addressing this, we experimentally measured interactions between a large size range of aquatic predators (4-6400 mg over 1347 feeding trials) and an invasive prey that transitions among habitats: from the water column (3D interactions) to simple and complex benthic substrates (2D interactions). Simple and complex substrates mediated successive reductions in capture rates - particularly around the unimodal optimum - and promoted prey population stability in model simulations. Many real consumer-resource systems transition between 2D and 3D interactions, and along complexity gradients. Thus, Context-Dependent Scaling (CDS) of feeding interactions could represent an unrecognised aspect of food webs, and quantifying the extent of CDS might enhance predictive ecology. © 2016 John Wiley & Sons Ltd/CNRS

'Selling it as a holistic health provision and not just about condoms ?' Sexual health services in school settings: current models and their relationship with sex and relationships education policy and provision

In this article we discuss the findings from a recent study of UK policy and practice in relation to sexual health services for young people, based in - or closely linked with - schools. This study formed part of a larger project, completed in 2009, which also included a systematic review of international research. The findings discussed in this paper are based on analyses of interviews with 51 service managers and questionnaire returns from 205 school nurses. Four themes are discussed. First, we found three main service permutations, in a context of very diverse and uneven implementation. Second, we identified factors within the school context that shaped and often constrained service provision; some of these also have implications for sex and relationships education (SRE). Third, we found contrasting approaches to the relationship between SRE input and sexual health provision. Fourth, we identified some specific barriers that need to be addressed in order to develop 'young people friendly' services in the school context. The relative autonomy available to school head teachers and governors can represent an obstacle to service provision - and inter-professional collaboration - in a climate where, in many schools, there is still considerable ambivalence about discussing 'sex' openly. In conclusion, we identify areas worthy of further research and development, in order to address some obstacles to sexual health service and SRE provision in schools

Competition between co-occurring invasive and native consumers switches between habitats

1.The introduction of a non‐native species frequently has adverse direct effects on native species. The underlying mechanisms, however, often remain unclear, in particular where native and invasive species are taxonomically similar. 2.We found evidence of direct competitive interactions between a globally distributed invasive species (the Pacific oyster, Magallana gigas) and its native counterpart (the European oyster, Ostrea edulis). We also discovered that the competitive outcome differed between different habitat types and orientation by identifying context‐dependent responses driven by environmental conditions and stress (i.e. intertidal compared to subtidal habitats; and vertical versus horizontal substratum). This is particularly important because the European oyster is threatened, or in decline, throughout most of its range and restoration efforts are underway in many regions. 3.We combined experimental manipulations and stable isotope analysis (SIA) to identify the direct effects of competition and the mechanisms by which the invasive and native species compete. We identified negative effects of the invasive species on the native oyster but these were limited to the subtidal habitat (lower stress environment) and determined by substratum orientation (habitat structure). Crucially, we found that effects of the invasive species on the native species were not always negative and under certain conditions (e.g. on vertical substrata) were positive. Shifts in isotopic niches of both species when co‐occurring, alongside mixing models, indicate that exploitative competition for food is most likely to underpin niche partitioning between both species. 4.We have identified different foraging strategies under different contexts and our findings highlight the importance of exploitative competition as a driving mechanism behind the co‐occurrence of two seemingly functionally similar consumers. The combination of experimental manipulations with SIA is a powerful tool and we illustrate how this approach should be incorporated, into multiple environmental contexts at appropriate scales, to more accurately predict impacts of the spread of invasive species on native communities

Predicting future stability of ecosystem functioning under climate change

To maintain food security under global change, we need to consider the stability of ecosystem functioning into the future, particularly in resource production landscapes such as agricultural pasture. With ongoing climate change, extreme climatic events are predicted to become more frequent and severe globally, impacting crop production. The whole process of farming will become more uncertain, from choice of crop and crop productivity to the timing of the windows of opportunity for management decisions. Future agricultural policies, therefore, should not only consider changes in grassland production, but also its future stability. We use a case study of agricultural pastures on the island of Ireland to project different components of ecosystem stability (resistance, recovery time and recovery rate) to 2050 and 2080 under different future climate scenarios: a peak and decline scenario; and a continued emissions scenario. We show that future climate change will have substantial effects on both the future resistance and the recovery of ecosystem functioning following environmental disturbances, but the spatial pattern of effect sizes is not the same for these two measures of stability. National level analyses and agricultural policies, therefore, are likely to ignore regional variation in future change. From this, we encourage the translation of stability-based constructs, as well as maximum yield considerations, into future agricultural policy at the regional level

Ecosystem stability at the landscape scale is primarily associated with climatic history

There is an increasing interest in landscape-scale perspectives of ecosystem functioning to inform policy and conservation decisions. However, we need a better understanding of the stability of ecosystem functioning (e.g. plant productivity) at the landscape scale to inform policy around topics such as global food security. We investigate the role of the ecological and environmental context on landscape-scale stability of plant productivity in agricultural pasture using remotely sensed enhanced vegetation index data. We determine whether four measures of stability (variability, magnitude of extreme anomalies, recovery time and recovery rate) are predicted by (a) species richness of vascular plants, (b) regional land cover heterogeneity and (c) climatic history. Stability of plant productivity was primarily associated with climatic history, particularly a history of extreme events. These effects outweighed any positive effects of species richness in the agricultural landscape. A history of variable and extreme climates both increased and decreased contemporary ecosystem stability, suggesting both cumulative and legacy effects, whereas land cover heterogeneity had no effect on stability. The landscape scale is a relevant spatial scale for the management of an ecosystem's stability. At this scale, we find that past climate is a stronger driver of stability in plant productivity than species richness, differing from results at finer field scales. Management should take an integrated approach by incorporating the environmental context of the landscape, such as its climatic history, and consider multiple components of stability to maintain functioning in landscapes that are particularly vulnerable to environmental change