Assessing rarity and threat in an arid-zone flora

被引:9
|
作者
Silcock, J. L. [1 ,3 ]
Fensham, R. J. [1 ,2 ]
Martin, T. G. [1 ,3 ]
机构
[1] Univ Queensland, Sch Biol Sci, Ctr Ecol, St Lucia, Qld 4072, Australia
[2] Queensland Herbarium, Dept Environm & Resource Management, Brisbane Bot Gardens, Toowong, Qld 4066, Australia
[3] CSIRO Ecosyst Sci, Sustainable Agr Flagship, Dutton Pk, Qld 4012, Australia
关键词
GREAT ARTESIAN BASIN; RED LIST CRITERIA; WESTERN-AUSTRALIA; SETTING PRIORITIES; SPECIES RICHNESS; SPRING WETLANDS; SIGHTING RECORD; CONSERVATION; PLANT; EXTINCTION;
D O I
10.1071/BT10318
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
An understanding of rarity and how it relates to extinction risk is a central concern of conservation biology. Classic conceptions of rarity revolve around spatial rarity, based on distribution and abundance, rather than temporal rarity, where species may be common following certain conditions but rare for most of the time. This form of rarity is likely to be especially prevalent in highly variable arid systems. Rarity in the arid zone is also characterised by poorly understood threats, such as grazing, and may also reflect low collection effort given the vast and inaccessible areas involved. This study explores rarity and threat in the arid zone, based on the flora of a large region of western Queensland. The status of all species known to occur in the study area was systematically assessed, and the current list of threatened species was examined for bias in forms of rarity, life forms and habitats. Five threat syndromes were identified, arising from the interaction of plant biology and threatening processes. Over 60 potentially threatened species have been overlooked in the listing process. The list is dominated by narrow endemics from residual and spring habitats and the species from springs at least are genuinely threatened. Widespread but sparsely occurring species are under-represented in the current list, as are grasses. With the exception of spring-dependent species, plant conservation in western Queensland is currently constrained by lack of basic data on distribution, abundance, population dynamics and realistic threat syndromes for nearly all species. Separating the influence of genuine rarity, temporal rarity and low collection effort, as well as a more detailed understanding of threatening processes are needed to address plant conservation in the arid zone.
引用
收藏
页码:336 / 350
页数:15
相关论文
共 50 条
  • [31] The use of hair tubes in detecting irruptive arid-zone rodents
    Crisp, Helen
    Pedler, Reece
    Moseby, Katherine
    [J]. AUSTRALIAN MAMMALOGY, 2018, 40 (02): : 230 - 233
  • [32] Convergence of tree water use within an arid-zone woodland
    O'Grady, A. P.
    Cook, P. G.
    Eamus, D.
    Duguid, A.
    Wischusen, J. D. H.
    Fass, T.
    Worldege, D.
    [J]. OECOLOGIA, 2009, 160 (04) : 643 - 655
  • [33] Incipient speciation in aquatic snails in an arid-zone spring complex
    Colgan, DJ
    Ponder, WF
    [J]. BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY, 2000, 71 (04) : 625 - 641
  • [34] The effects of an arid-zone road on vertebrates: what are the priorities for management?
    Lee, Enhua
    Croft, David B.
    [J]. TOO CLOSE FOR COMFORT : CONTENTIOUS ISSUES IN HUMAN-WILDLIFE ENCOUNTERS, 2008, : 105 - 117
  • [35] Convergence of tree water use within an arid-zone woodland
    A. P. O’Grady
    P. G. Cook
    D. Eamus
    A. Duguid
    J. D. H. Wischusen
    T. Fass
    D. Worldege
    [J]. Oecologia, 2009, 160 : 643 - 655
  • [36] Adaptive heterothermy and selective brain cooling in arid-zone mammals
    Mitchell, D
    Maloney, SK
    Jessen, C
    Laburn, HP
    Kamerman, PR
    Mitchell, G
    Fuller, A
    [J]. COMPARATIVE BIOCHEMISTRY AND PHYSIOLOGY B-BIOCHEMISTRY & MOLECULAR BIOLOGY, 2002, 131 (04): : 571 - 585
  • [37] The ages and fecundity of some arid-zone plants in Western Australia
    Davies, S. J. J. F.
    Kenny, S. A.
    [J]. RANGELAND JOURNAL, 2013, 35 (04): : 455 - 468
  • [38] Seasonal behavioral responses of an arid-zone passerine in a hot environment
    Pattinson, Nicholas B.
    Smit, Ben
    [J]. PHYSIOLOGY & BEHAVIOR, 2017, 179 : 268 - 275
  • [39] Male semelparity and multiple paternity confirmed in an arid-zone dasyurid
    Hayes, G. L. T.
    Simmons, L. W.
    Dugand, R. J.
    Mills, H. R.
    Roberts, J. D.
    Tomkins, J. L.
    Fisher, D. O.
    [J]. JOURNAL OF ZOOLOGY, 2019, 308 (04) : 266 - 273
  • [40] Assessing chlorophyll-a and water quality dynamics in arid-zone temporary pan systems along a disturbance gradient
    Mungenge, Chipo P.
    Wasserman, Ryan J.
    Dondofema, Farai
    Keates, Chad
    Masina, Fannie M.
    Dalu, Tatenda
    [J]. SCIENCE OF THE TOTAL ENVIRONMENT, 2023, 873