Abstract
Both invasive alien trees and agricultural conversion have major impacts on biodiversity. We studied here the comparative impact of these two types of land transformation on a wide range of surface-active arthropod species using pitfall traps, with evergreen sclerophyllous natural vegetation (fynbos) as the control. The study was in the Cape Floristic Region, a global biodiversity hotspot, where alien trees are of major concern and where vineyards replace natural fynbos vegetation. Surface-active arthropods were selected as they are species rich, relatively immobile, and occur in high abundance. We hypothesized that the impact of the two types of land cover transformation would produce similar qualitative and quantitative effects on the arthropods. We also compared the results in the transformed and natural areas with those in areas cleared of alien trees. Arthropod species richness in cleared areas was higher than in vineyards and more similar to that in natural fynbos, while alien trees had the lowest. Overall abundance scores were highest in cleared areas, closely followed by fynbos, then vineyards and lowest in alien trees. Several species were restricted to each vegetation type, including alien trees. In terms of assemblage composition, all vegetation types were significantly different, although fynbos and vineyards grouped, suggesting that vineyards have less impact on the arthropod community than do alien trees. When rare species were excluded, vineyards and cleared sites grouped, indicating some recovery but only involving those species that were common and habitat tolerant. Our results suggest that vineyards retain a greater complement of indigenous species than alien trees, but that clearing of these aliens soon encourages establishment of indigenous species. Although there were significant differences in soil moisture and litter depth within and between vegetation types, we did not record them as significantly affecting species richness or abundance, even in alien vegetation, an encouraging sign for restoration.
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References
Armstrong AJ, Van Hensbergen HJ (1996) Impacts of afforestation with pines on assemblages of native biota in South Africa. South Afr For J 175:35–42
Borgelt A, New TR (2006) Pitfall trapping for ants (Hymenoptera, Formicidae) in mesic Australia: what is the best trapping period? J Insect Conserv 10:75–77
Brändle M, Durka W, Altmoos M (2000) Diversity of surface dwelling beetle assemblages in open-cast lignite mines in central Germany. Biodivers Conserv 9:1297–1311
Carpintero S, Reyes-López J, Arias de Reyna L (2005) Impact of Argentine Ants (Linepithema humile) on an arboreal ant community in Donana National Park, Spain. Biodivers Conserv 14:151–163
Chazdon RL, Colwell RK, Denslow JS, Guariguata MR (1998) Species richness of woody regeneration in primary and secondary rainforests of northeastern Costa Rica. In: Dallmeier F, Comiskey JA (eds) Forest biodiversity research, monitoring and modeling: conceptual background and old World case studies. Pathenon, Paris
Chytrý M, Maskell LC, Pino J, Pyšek P, Vilà M, Font X, Smart SM (2008) Habitat invasions by alien plants: a quantitative comparison among Mediterranean, subcontinental and oceanic regions of Europe. J Appl Ecol 45:448–458
Clarke KR, Gorley RN (2001) Primer Version 5. Primer-E, Plymouth
Clarke KR, Warwick RM (2001) Change in marine communities: an approach to statistical analysis and interpretation. PRIMER-E, Plymouth
Colwell RK (2006) EstimateS 8.0.0. http://viceroy.eeb.uconn.edu/EstimateS
Colwell RK, Coddington JA (1994) Estimating terrestrial biodiversity through extrapolation. Phil Trans Roy Soc 345:101–118
Donald PF, Evans AD (2006) Habitat connectivity and matrix restoration: the wider implications of agri-environment schemes. J Appl Ecol 43:209–218
Feber RE, Smith H, MacDonald DW (1996) The effects on butterfly abundance of the management of uncropped edges of arable fields. J Appl Ecol 33:1191–1205
Fleishman E, Austin GT, Brussard PF, Murphy DD (1999) A comparison of butterfly communities in native and agricultural riparian habitats in the great basin. Biol Conserv 89:209–218
Gaigher R, Samways MJ (2010) Surface-active arthropods in organic vineyards, integrated vineyards and natural habitat in the Cape Floristic Region. J Insect Conserv 14:595–605
Giliomee JH (2003) Insect diversity in the Cape Floristic Region. Afr J Ecol 41:237–244
Holl KD (1996) The effect of coal surface mine reclamation on diurnal lepidopteran conservation. J Appl Ecol 33:225–236
Holmes PM, Richardson DM (1999) Protocols for restoration based on recruitment dynamics, community structure, and ecosystem function: perspectives from South African fynbos. Rest Ecol 7:215–230
Holway DA, Lach L, Suarez AV, Tsutsui ND, Case TJ (2002) The causes and consequences of ant invasions. Annu Rev Ecol Syst 33:181–233
Hortal J, Borges PAV, Gaspar C (2006) Evaluating the performance of species richness estimators: sensitivity to sample grain size. J Anim Ecol 75:274–287
Jeanneret P, Schüpbach B, Pfiffner L, Walter T (2003) Arthropod reaction to landscape and habitat features in agricultural landscapes. Land Ecol 18:253–263
Johnson SD (1992) Plant–animal relationships. In: Cowling RM (ed) The ecology of fynbos: nutrients, fire and diversity. Oxford University Press, Cape Town, pp 175–205
Kleijn D, van Langevelde F (2006) Interaction effects of landscape context and habitat quality on flower visiting insects in agricultural landscapes. Basic Appl Ecol 7:201–214
Le Maitre DC, Richardson DM, Chapman RA (2004) Alien plant invasions in South Africa: driving forces and the human dimension. South Afr J Sci 100:103–112
Legendre P, Legendre L (1998) Numerical ecology: developing in environmental Modelling 20. Elsevier, Amsterdam
Linder HP (2005) Evolution of diversity: the Cape flora. Trends Plant Sci 10:536–541
Macdonald IAW, Richardson DM (1986) Alien species in terrestrial ecosystems of the fynbos biome. In: Macdonald IAW, Kruger FJ, Ferrar AA (eds) The ecology and management of biological invasions in southern Africa. Oxford University Press, Cape Town, pp 77–91
Mack RN, Simberloff D, Lonsdale WM, Evans H, Clout M, Bazzaz FA (2000) Biotic invasions: causes, epidemiology, global consequences, and control. Ecol Appl 10:689–710
Magoba RN, Samways MJ (2010) Recovery of benthic macroinvertebrate and adult dragonfly assemblages in response to large scale removal of riparian invasive alien trees. J Insect Conserv 14:627–636
Mason TJ, French K (2008) Impacts of a woody invader vary in different vegetation communities. Divers Distrib 14:829–838
Mittermeier RA, Gil PR, Hoffman M, Pilgrim J, Brooks T, Mittermeier CG, Lamoreux J, da Fonseca GAB (2005) Hotspots revisited: earth’s biologically richest and most endangered terrestrial ecoregions. Conservation International and Agrupacion Sierra Madre, Monterrey, Cemex
Newton I (2004) The recent declines of farmland bird populations in Britain: an appraisal of causal factors and conservation action. Ibis 146:579–600
Picker MD, Samways MJ (1996) Faunal diversity and endemicity of the Cape Peninsula, South Africa—a first assessment. Biodivers Conserv 5:591–606
Procheş Ş, Cowling RM (2006) Insect diversity in Cape fynbos and neighbouring South African vegetation. Global Ecol Biogeogr 15:445–451
Procheş Ş, Forest F, Veldtman R, Chown SL, Cowling RM, Johnson SD, Richardson DM, Savolainen V (2009) Dissecting the plant–insect diversity relationship in the Cape. Mol Phyl Evol 51:94–99
Pryke JS, Samways MJ (2008) Conservation of invertebrate biodiversity on a mountain in a global biodiversity hotspot, Cape Floral Region. Biodivers Conserv 17:3027–3043
Pryke JS, Samways MJ (2009) Recovery of invertebrate diversity in a rehabilitated city landscape mosaic in the heart of a biodiversity hotspot. Land Urb Plan 93:54–62
Ratsirarson H, Robertson HG, Picker MD, van Noort S (2002) Indigenous forests versus exotic eucalypt and pine plantations: a comparison of leaf-litter invertebrate communities. Afr Entomol 10:93–99
Richardson DM, Pyšek P (2006) Plant invasions: merging the concepts of species invasiveness and community invasibility. Prog Phys Geogr 30:409–431
Richardson DM, van Wilgen BW (2004) Invasive alien plants in South Africa: how well do we understand the ecological impacts? South Afr J Sci 100:45–52
Rouget M, Cowling RM, Pressey RL, Richardson DM (2003) Identifying spatial components of ecological and evolutionary processes for regional conservation planning in the Cape Floristic Region, South Africa. Divers Distrib 9:191–210
Sala OE, Chapin FS III, Armesto JJ, Berlow R, Bloomfield J, Dirzo R, Huber-Sanwald E, Huenneke LF, Jackson RB, Kinzig A, Leemans R, Lodge D, Mooney HA, Oesterheld M, Poff NL, Sykes MT, Walker BH, Walker M, Wall DH (2000) Global biodiversity scenarios for the year 2100. Science 287:1770–1774
Samways MJ (2003) Threats to the tropical island dragonfly fauna (Odonata) of Mayotte, Comoro archipelago. Biodivers Conserv 12:1785–1792
Samways MJ, Moore SD (1991) Influence of exotic conifer patches on grasshopper (Orthoptera) assemblages in a grassland matrix at a recreational resort, Natal, South Africa. Biol Conserv 57:205–219
Samways MJ, Sharratt NJ (2010) Recovery of endemic dragonflies after removal of invasive alien trees. Conserv Biol 24:267–277
Samways MJ, Taylor S (2004) Impacts of invasive alien plants on Red-Listed South African dragonflies (Odonata). South Afr J Sci 100:78–80
Samways MJ, Caldwell PM, Osborn RM (1996) Ground-living invertebrate assemblages in native, planted and invasive vegetation in South Africa. Agric Ecosyst Environ 59:19–32
Samways MJ, McGeoch MA, New TR (2010) Insect conservation: a handbook of approaches and methods (techniques in ecology and conservation). Oxford University Press, Oxford
Shreeve TG, Mason CF (1980) The number of butterfly species in woodlands. Oecologia 45:414–418
Sibatani A (1980) Wing homoeosis in Lepidoptera: a survey. Dev Biol 79:1–18
Simberloff D, Nuñez MA, Ledgard NJ, Pauchard A, Richardson DM, Sarasola M, van Wilgen BW, Zalba SM, Zenni RD, Bustamante R, Peña E, Ziller SR (2010) Sprea and impact of introduced conifers in South America. Austral Ecol 35:489–504
SPSS Inc. (2006) SPSS version 15.0 for windows. SPSS Inc., Chicago
Suarez AV, Bolger DT, Case TJ (1998) Effects of fragmentation and invasion on native ant communities in coastal southern California. Ecology 79:2041–2056
Suarez AV, Richmond JQ, Case TJ (2000) Prey selection in horned lizards following the invasion of Argentine ants in southern California. Ecol Appl 10:711–725
Tilman D, Fargione J, Wolff B, D’Antonio C, Dobson A, Howarth R, Schindler D, Schlesinger WH, Simberloff D, Swackhamer D (2001) Forecasting agriculturally driven global environment change. Science 292:281–284
Turin H, den Boer PJ (1988) Changes in the distribution of carabid beetles in the Netherlands since 1880. II. Isolation of habitats and long-term time trends in the occurrence of carabid species with different powers of dispersal (Coleoptera, Carabidae). Biol Conserv 44:179–200
Ward P (2005) A synoptic review of the ants of California (Hymenoptera: Formicidae). Zootaxa 936:1–63
Warren MS, Barnett LK, Gibbons DW, Avery MI (1997) Assessing national conservation priorities: an improved Red List of British butterflies. Biol Conserv 82:317–328
Wiens JA, Stenseth NC, Horne B, van Ims RA (1993) Ecological mechanisms in landscape ecology. Oikos 66:369–380
Wittenberg R, Cock MJW (eds) (2001) Invasive alien species: a toolkit of best prevention and management practices. CAB International, Wallingford, UK
Wood PA, Samways MJ (1991) Landscape element pattern and continuity of butterfly flight paths in an ecologically landscaped botanic garden, Natal, South Africa. Biodivers Conserv 58:149–166
Wright MG, Samways MJ (1998) Insect species richness tracking plant species richness in a diverse flora: gall-insects in the Cape Floristic Region, South Africa. Oecologia 115:427–433
Acknowledgments
Financial support was from the Centre for Invasion Biology and the Andrew Mellon Foundation. Rejoyce Gavhi, Rozwivhona Magoba, Mbula Tshikalange, Adam Johnson, Tshilidzi Muofhe and Sne Mchunu kindly assisted in the field. Ansie Dipenaar identified spiders, and Henk Geertsema assisted with other identifications. We also appreciate the very constructive criticisms of two anonymous referees which greatly improved the manuscript.
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Magoba, R.N., Samways, M.J. Comparative footprint of alien, agricultural and restored vegetation on surface-active arthropods. Biol Invasions 14, 165–177 (2012). https://doi.org/10.1007/s10530-011-9994-x
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DOI: https://doi.org/10.1007/s10530-011-9994-x