Shrub Encroachment Is Linked to Extirpation of an Apex Predator
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Effects of Human Disturbance on Terrestrial Apex Predators
diversity Review Effects of Human Disturbance on Terrestrial Apex Predators Andrés Ordiz 1,2,* , Malin Aronsson 1,3, Jens Persson 1 , Ole-Gunnar Støen 4, Jon E. Swenson 2 and Jonas Kindberg 4,5 1 Grimsö Wildlife Research Station, Department of Ecology, Swedish University of Agricultural Sciences, SE-730 91 Riddarhyttan, Sweden; [email protected] (M.A.); [email protected] (J.P.) 2 Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Postbox 5003, NO-1432 Ås, Norway; [email protected] 3 Department of Zoology, Stockholm University, SE-10691 Stockholm, Sweden 4 Norwegian Institute for Nature Research, NO-7485 Trondheim, Norway; [email protected] (O.-G.S.); [email protected] (J.K.) 5 Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, SE-901 83 Umeå, Sweden * Correspondence: [email protected] Abstract: The effects of human disturbance spread over virtually all ecosystems and ecological communities on Earth. In this review, we focus on the effects of human disturbance on terrestrial apex predators. We summarize their ecological role in nature and how they respond to different sources of human disturbance. Apex predators control their prey and smaller predators numerically and via behavioral changes to avoid predation risk, which in turn can affect lower trophic levels. Crucially, reducing population numbers and triggering behavioral responses are also the effects that human disturbance causes to apex predators, which may in turn influence their ecological role. Some populations continue to be at the brink of extinction, but others are partially recovering former ranges, via natural recolonization and through reintroductions. -
Sturt National Park
Plan of Management Sturt National Park © 2018 State of NSW and the Office of Environment and Heritage With the exception of photographs, the State of NSW and the Office of Environment and Heritage (OEH) are pleased to allow this material to be reproduced in whole or in part for educational and non-commercial use, provided the meaning is unchanged and its source, publisher and authorship are acknowledged. Specific permission is required for the reproduction of photographs. OEH has compiled this publication in good faith, exercising all due care and attention. No representation is made about the accuracy, completeness or suitability of the information in this publication for any particular purpose. OEH shall not be liable for any damage that may occur to any person or organisation taking action or not on the basis of this publication. All content in this publication is owned by OEH and is protected by Crown Copyright. It is licensed under the Creative Commons Attribution 4.0 International (CC BY 4.0) , subject to the exemptions contained in the licence. The legal code for the licence is available at Creative Commons . OEH asserts the right to be attributed as author of the original material in the following manner: © State of New South Wales and Office of Environment and Heritage 2018. This plan of management was adopted by the Minister for the Environment on 23 January 2018. Acknowledgments OEH acknowledges that Sturt is in the traditional Country of the Wangkumara and Malyangapa people. This plan of management was prepared by staff of the NSW National Parks and Wildlife Service (NPWS), part of OEH. -
Biological Conservation 232 (2019) 187–193
Biological Conservation 232 (2019) 187–193 Contents lists available at ScienceDirect Biological Conservation journal homepage: www.elsevier.com/locate/biocon A palaeontological perspective on the proposal to reintroduce Tasmanian devils to mainland Australia to suppress invasive predators T ⁎ Michael C. Westawaya, , Gilbert Priceb, Tony Miscamblec, Jane McDonaldb, Jonathon Crambb, ⁎ Jeremy Ringmad, Rainer Grüna, Darryl Jonesa, Mark Collarde, a Australian Research Centre for Human Evolution, Environmental Futures Research Institute, N13 Environment 2 Building, Griffith University, Nathan Campus, 170 Kessels Road, Nathan, Brisbane, Queensland 4111, Australia b School of Earth and Environmental Sciences, University of Queensland, St. Lucia, Brisbane, Queensland, Australia c School of Social Science, University of Queensland, St. Lucia, Brisbane, Queensland, Australia d College of Tropical Agriculture and Human Resources, University of Hawai‘i at Manoa, 2500 Campus Road, Honolulu, Hawai'i 96822, USA e Department of Archaeology, Simon Fraser University, 8888 University Drive, Burnaby, British Columbia V5A 1S6, Canada ARTICLE INFO ABSTRACT Keywords: The diversity of Australia's mammalian fauna has decreased markedly since European colonisation. Species in Australia the small-to-medium body size range have been particularly badly affected. Feral cats and foxes have played a Invasive predator central role in this decline and consequently strategies for reducing their numbers are being evaluated. One such Fossil record strategy is the reintroduction to the mainland of the Tasmanian devil, Sarcophilus harrisii. Here, we provide a Feral cat palaeontological perspective on this proposal. We begin by collating published records of devil remains in Fox Quaternary deposits. These data show that the range of devils once spanned all the main ecological zones in Tasmanian devil Sarcophilus Australia. -
Cost Effective Feral Animal Exclusion Fencing for Areas of High
Cost Effective Feral Animal Exclusion Fencing for Areas of High Conservation Value in Australia Cost Effective Feral Animal Exclusion Fencing for Areas of High Conservation Value in Australia A report for the: Australian Government The Department of the Environment and Heritage Prepared by: Kirstin Long and Alan Robley Arthur Rylah Institute for Environmental Research Department of Sustainability and Environment Heidelberg, Melbourne July 2004 Cost Effective Feral Animal Exclusion Fencing for Areas of High Conservation Value in Australia by Long, K and Robley, A. The views and opinions expressed in this publication are those of the authors and do not necessarily reflect those of the Australian Government or the Minister for the Environment and Heritage. While reasonable efforts have been made to ensure that the contents of this publication are factually correct, the Commonwealth does not accept responsibility for the accuracy or completeness of the contents, and shall not be liable for any loss or damage that may be occasioned directly or indirectly through the use of, or reliance on, the contents of this publication. ISBN: 0642 549923 Published July 2004 © Commonwealth of Australia 2004 This work is copyright. Apart from any use as permitted under the Copyright Act 1968, no part may be reproduced by any process without prior written permission from the Commonwealth, available from the Department of the Environment and Heritage. Requests and inquiries concerning reproduction and rights should be addressed to: Director Threat Abatement -
Calculation and Use of Selectivity Coefficients of Feeding: Zooplankton Grazing *
Ecological Modelling, 7 (1979) 135--149 135 © Elsevier Scientific Publishing Company, Amsterdam -- Printed in The Netherlands CALCULATION AND USE OF SELECTIVITY COEFFICIENTS OF FEEDING: ZOOPLANKTON GRAZING * HENRY A. VANDERPLOEG and DONALD SCAVIA National Oceanic and Atmospheric Administration, Environmental Research Laboratories, Great Lakes Environmental Research Laboratory, Ann Arbor, Mich. 48104 (U.S.A.) (Received 8 June 1978; revised 27 September 1978) ABSTRACT Vanderploeg, H.A. and Scavia, D., 1979. Calculation and use of selectivity coefficients of feeding: zooplankton grazing. Ecol. Modelling, 7: 135--149. A straightforward method of calculating selectivity coefficients (Wii) of predation from raw data, mortality rates of prey, filtering rates, feeding rates and electivity indices is derived. Results from a comparison of selectivity coefficients for the copepod Diaptomus oregonensis grazing under a number of experimental conditions suggest that Wij's for size- selective feeding are invariant, a conclusion also supported by the leaky-sieve model. Recommendations are made on how to use Wij's in linear and nonlinear feeding constructs for zooplankton and other animals. INTRODUCTION Many recent aquatic ecosystem models have been designed to simulate seasonal succession of phytoplankton and zooplankton. In order to accom- plish this, the models have included several phytoplankton and zooplankton groups (Bloomfield et al., 1973; Park et al., 1974; Canale et al., 1976; Scavia et al., 1976a and b; Bierman, 1976). A main factor controlling successional change in both phytoplankton and zooplankton is zooplankton selective feeding (cf. Porter, 1977). Many field and laboratory studies have been carried out to quantify the selection process; however, the forms in which the data are reported are not immediately applicable to models. -
Single Gene Locus Changes Perturb Complex Microbial Communities As Much As Apex Predator Loss
ARTICLE Received 5 Dec 2014 | Accepted 30 Jul 2015 | Published 10 Sep 2015 DOI: 10.1038/ncomms9235 OPEN Single gene locus changes perturb complex microbial communities as much as apex predator loss Deirdre McClean1,2, Luke McNally3,4, Letal I. Salzberg5, Kevin M. Devine5, Sam P. Brown6 & Ian Donohue1,2 Many bacterial species are highly social, adaptively shaping their local environment through the production of secreted molecules. This can, in turn, alter interaction strengths among species and modify community composition. However, the relative importance of such behaviours in determining the structure of complex communities is unknown. Here we show that single-locus changes affecting biofilm formation phenotypes in Bacillus subtilis modify community structure to the same extent as loss of an apex predator and even to a greater extent than loss of B. subtilis itself. These results, from experimentally manipulated multi- trophic microcosm assemblages, demonstrate that bacterial social traits are key modulators of the structure of their communities. Moreover, they show that intraspecific genetic varia- bility can be as important as strong trophic interactions in determining community dynamics. Microevolution may therefore be as important as species extinctions in shaping the response of microbial communities to environmental change. 1 Department of Zoology, School of Natural Sciences, Trinity College Dublin, Dublin D2, Ireland. 2 Trinity Centre for Biodiversity Research, Trinity College Dublin, Dublin D2, Ireland. 3 Centre for Immunity, Infection and Evolution, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FL, UK. 4 Institute of Evolutionary Biology, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3FL, UK. 5 Smurfit Institute of Genetics, School of Genetics and Microbiology, Trinity College Dublin, Dublin D2, Ireland. -
Grazing and Browsing Behavior, Grazing Management, Forage Evaluation and Goat Performance: Strategies to Enhance Meat Goat Production in North Carolina
1 Grazing and Browsing Behavior, Grazing Management, Forage Evaluation and Goat Performance: Strategies to Enhance Meat Goat Production in North Carolina Jean-Marie Luginbuhl, Professor, J. Paul Mueller, Professor and Interim Dean of International Programs, James. T. Green, Jr., Professor Emeritus, Douglas S. Chamblee, Professor Emeritus, and Heather M. Glennon, Meat Goat Program Research Technician and PhD candidate College of Agriculture and Life Sciences, North Carolina State University Campus Box 7620, Raleigh NC 27695 ABSTRACT the use of high quality forage and browse and the Goats (Capra hircus hircus) offer an opportunity strategic use of expensive concentrate feeds. This can to more effectively convert pasture nutrients to be achieved by developing a year-round forage animal products as milk, meat and fiber which are program allowing for as much grazing as possible currently marketable and in demand by a growing throughout the year. segment of the US population. With the introduction of the Boer breed and the upgrading of meat-type Some people still believe that goats eat and do goats with Boer genetics, research focusing on well on low quality feed. Attempting to manage and forage evaluation, feeding strategies and the feed goats with such a belief will not lead to development of economical grazing systems was successful meat goat production. On pasture or urgently needed to meet the needs of this emerging rangeland, maximum goat gains or reproduction can industry. The first part of this paper focuses on the be attained by combining access to large quantities of quality forage that allow for selective feeding. description of grazing/browsing behavior of goats and grazing management, and grazing strategies such Goat Brazing/Browsing Behavior as control and strip grazing, differences between Goats are very active foragers, able to cover a control and continuous grazing, forward creep wide area in search of scarce plant materials. -
A Review of Planktivorous Fishes: Their Evolution, Feeding Behaviours, Selectivities, and Impacts
Hydrobiologia 146: 97-167 (1987) 97 0 Dr W. Junk Publishers, Dordrecht - Printed in the Netherlands A review of planktivorous fishes: Their evolution, feeding behaviours, selectivities, and impacts I Xavier Lazzaro ORSTOM (Institut Français de Recherche Scientifique pour le Développement eri Coopération), 213, rue Lu Fayette, 75480 Paris Cedex IO, France Present address: Laboratorio de Limrzologia, Centro de Recursos Hidricob e Ecologia Aplicada, Departamento de Hidraulica e Sarzeamento, Universidade de São Paulo, AV,DI: Carlos Botelho, 1465, São Carlos, Sï? 13560, Brazil t’ Mail address: CI? 337, São Carlos, SI? 13560, Brazil Keywords: planktivorous fish, feeding behaviours, feeding selectivities, electivity indices, fish-plankton interactions, predator-prey models Mots clés: poissons planctophages, comportements alimentaires, sélectivités alimentaires, indices d’électivité, interactions poissons-pltpcton, modèles prédateurs-proies I Résumé La vision classique des limnologistes fut de considérer les interactions cntre les composants des écosystè- mes lacustres comme un flux d’influence unidirectionnel des sels nutritifs vers le phytoplancton, le zoo- plancton, et finalement les poissons, par l’intermédiaire de processus de contrôle successivement physiqucs, chimiques, puis biologiques (StraSkraba, 1967). L‘effet exercé par les poissons plaiictophages sur les commu- nautés zoo- et phytoplanctoniques ne fut reconnu qu’à partir des travaux de HrbáEek et al. (1961), HrbAEek (1962), Brooks & Dodson (1965), et StraSkraba (1965). Ces auteurs montrèrent (1) que dans les étangs et lacs en présence de poissons planctophages prédateurs visuels. les conimuiiautés‘zooplanctoniques étaient com- posées d’espèces de plus petites tailles que celles présentes dans les milieux dépourvus de planctophages et, (2) que les communautés zooplanctoniques résultantes, composées d’espèces de petites tailles, influençaient les communautés phytoplanctoniques. -
Hammill, E., & Clements, C. F. (2020
Hammill, E. , & Clements, C. F. (2020). Imperfect detection alters the outcome of management strategies for protected areas. Ecology Letters, 23(4), 682-691. https://doi.org/10.1111/ele.13475 Peer reviewed version Link to published version (if available): 10.1111/ele.13475 Link to publication record in Explore Bristol Research PDF-document This is the author accepted manuscript (AAM). The final published version (version of record) is available online via Wiley at https://onlinelibrary.wiley.com/doi/full/10.1111/ele.13475. Please refer to any applicable terms of use of the publisher. University of Bristol - Explore Bristol Research General rights This document is made available in accordance with publisher policies. Please cite only the published version using the reference above. Full terms of use are available: http://www.bristol.ac.uk/red/research-policy/pure/user-guides/ebr-terms/ 1 Imperfect detection alters the outcome of management strategies for protected areas 2 Edd Hammill1 and Christopher F. Clements2 3 1Department of Watershed Sciences and the Ecology Center, Utah State University, 5210 Old 4 Main Hill, Logan, UT, USA 5 2School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK 6 Statement of Authorship. The experiment was conceived by EH following multiple 7 conversations with CFC. EH conducted the experiment and ran the analyses relating to species 8 richness, probability of predators, and number of extinctions. CFC designed and conducted all 9 analyses relating to sampling protocols. EH wrote the first draft -
Novel Trophic Cascades: Apex Predators
Opinion Novel trophic cascades: apex predators enable coexistence 1 2 3,4 Arian D. Wallach , William J. Ripple , and Scott P. Carroll 1 Charles Darwin University, School of Environment, Darwin, Northern Territory, Australia 2 Trophic Cascades Program, Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR 97331, USA 3 Institute for Contemporary Evolution, Davis, CA 95616, USA 4 Department of Entomology and Nematology, University of California, Davis, CA 95616, USA Novel assemblages of native and introduced species and that lethal means can alleviate this threat. Eradica- characterize a growing proportion of ecosystems world- tion of non-native species has been achieved mainly in wide. Some introduced species have contributed to small and strongly delimited sites, including offshore extinctions, even extinction waves, spurring widespread islands and fenced reserves [6,7]. There have also been efforts to eradicate or control them. We propose that several accounts of population increases of threatened trophic cascade theory offers insights into why intro- native species following eradication or control of non-na- duced species sometimes become harmful, but in other tive species [7–9]. These effects have prompted invasion cases stably coexist with natives and offer net benefits. biologists to advocate ongoing killing for conservation. Large predators commonly limit populations of poten- However, for several reasons these outcomes can be inad- tially irruptive prey and mesopredators, both native and equate measures of success. introduced. This top-down force influences a wide range Three overarching concerns are that most control efforts of ecosystem processes that often enhance biodiversity. do not limit non-native species or restore native communi- We argue that many species, regardless of their origin or ties [10,11], control-dependent recovery programs typically priors, are allies for the retention and restoration of require indefinite intervention [3], and many control biodiversity in top-down regulated ecosystems. -
SHEEP, DINGOES and KANGAROOS: NEW CHALLENGES and a CHANGE of DIRECTION 20 YEARS on Peter Clark1, Elizabeth Clark1 and Benjamin L
Citation: Clark P, Clark E, Allen BL (2018). Sheep, dingoes and kangaroos: new challenges and a change of direction 20 years on. In 'Advances in conservation through sustainable use of wildlife.' Eds G Baxter, N Finch, P Murray. pp. 173–178 (University of Queensland: Brisbane). Available online at: https://onlineshop.ssaa.org.au/product-category/publications/ SHEEP, DINGOES AND KANGAROOS: NEW CHALLENGES AND A CHANGE OF DIRECTION 20 YEARS ON Peter Clark1, Elizabeth Clark1 and Benjamin L. Allen2* 1Leander Station, Longreach, Queensland 4730, Australia. Email: [email protected] 2University of Southern Queensland, Institute for Agriculture and the Environment, Toowoomba, Queensland 4350. Email: [email protected] *Corresponding author. ABSTRACT Predation and competition are two primary forces limiting the extent to which sheep can be grazed in the Australian rangelands, particularly in Queensland. Dingo predation has been non-existent in much of the sheep zone since the localised eradication of dingoes in the early 1900s. Competition with kangaroos has been ever-present, but was previously managed (to some extent) by the commercial kangaroo harvesting industry. However, changes to dingo distribution and kangaroo densities and harvesting over the last 20 years have meant that dingo predation and kangaroo competition again threaten viable sheep production in the rangelands. Dingoes have increased their distribution and density in almost all sheep grazing areas and contemporary lethal control efforts are not preventing the decline of sheep. Loss of valuable international markets and moves to now harvest only adult male kangaroos means that the kangaroo harvesting industry produces little relief from kangaroo grazing pressure (given that kangaroo population growth is little affected by removal of adult males; see Finch et al. -
Your Complete Guide to Broken Hill and The
YOUR COMPLETE GUIDE TO DESTINATION BROKEN HILL Mundi Mundi Plains Broken Hill 2 City Map 4–7 Getting There and Around 8 HistoriC Lustre 10 Explore & Discover 14 Take a Walk... 20 Arts & Culture 28 Eat & Drink 36 Silverton Places to Stay 42 Shopping 48 Silverton prospects 50 Corner Country 54 The Outback & National Parks 58 Touring RoutEs 66 Regional Map 80 Broken Hill is on Australian Living Desert State Park Central Standard Time so make Line of Lode Miners Memorial sure you adjust your clocks to suit. « Have a safe and happy journey! Your feedback about this guide is encouraged. Every endeavour has been made to ensure that the details appearing in this publication are correct at the time of printing, but we can accept no responsibility for inaccuracies. Photography has been provided by Broken Hill City Council, Destination NSW, NSW National Parks & Wildlife Service, Simon Bayliss, The Nomad Company, Silverton Photography Gallery and other contributors. This visitor guide has been designed by Gang Gang Graphics and produced by Pace Advertising Pty. Ltd. ABN 44 005 361 768 Tel 03 5273 4777 W pace.com.au E [email protected] Copyright 2020 Destination Broken Hill. 1 Looking out from the Line Declared Australia’s first heritage-listed of Lode Miners Memorial city in 2015, its physical and natural charm is compelling, but you’ll soon discover what the locals have always known – that Broken Hill’s greatest asset is its people. Its isolation in a breathtakingly spectacular, rugged and harsh terrain means people who live here are resilient and have a robust sense of community – they embrace life, are self-sufficient and make things happen, but Broken Hill’s unique they’ve always got time for each other and if you’re from Welcome to out of town, it doesn’t take long to be embraced in the blend of Aboriginal and city’s characteristic old-world hospitality.