SPATIAL HETEROGENEITY INFLUENCES NATIVE AND NONNATIVE PLANT SPECIES RICHNESS DOI
Sunil Kumar,

Thomas J. Stohlgren,

Geneva W. Chong

и другие.

Ecology, Год журнала: 2006, Номер 87(12), С. 3186 - 3199

Опубликована: Дек. 1, 2006

Spatial heterogeneity may have differential effects on the distribution of native and nonnative plant species richness. We examined spatial richness distributions in central part Rocky Mountain National Park, Colorado, USA. around vegetation plots was characterized using landscape metrics, environmental/topographic variables (slope, aspect, elevation, distance from stream or river), soil (nitrogen, clay, sand). The metrics represented five components were measured at four extents (within varying radii 120, 240, 480, 960 m) FRAGSTATS pattern analysis program. Akaike's Information Criterion adjusted for small sample size (AICc) used to select best models a set multiple linear regression developed three levels ecological hierarchy (i.e., landscape, land cover, community). Both positively correlated with edge density, Simpson's diversity index interspersion/juxtaposition index, negatively mean patch size. amount variation explained hierarchical ranged 30% 70%. At level, 43% 70% (240-m extent). In general, always higher richness, inclusion significantly improved models. 66% both conifer cover type lodgepole pine community. relative influence differed varied extent hierarchy. study offers an approach quantify improve biodiversity. results demonstrate that ecologists must recognize importance managing species.

Язык: Английский

Minireview: Quantifying Landscape Spatial Pattern: What Is the State of the Art? DOI
Eric J. Gustafson

Ecosystems, Год журнала: 1998, Номер 1(2), С. 143 - 156

Опубликована: Март 1, 1998

Язык: Английский

Процитировано

1553
From Balance of Nature to Hierarchical Patch Dynamics: A Paradigm Shift in Ecology DOI
Jianguo Wu,

Orie L. Loucks

The Quarterly Review of Biology, Год журнала: 1995, Номер 70(4), С. 439 - 466

Опубликована: Дек. 1, 1995

A common assumption historically in ecology is evident the term "balance of nature." The phrase usually implies that undisturbed nature ordered and harmonius, ecological systems return to a previous equilibrium after disturbances. more recent concepts point static stability, which characterize classical paradigm ecology, are traceable assumptions implicit view, however, has failed not only because conditions rare nature, but also our past inability incorporate heterogeneity scale multiplicity into quantitative expresssions for stability. theories models built around these equlibrium stability principles have misrepresented foundations resource management, conservation, environemtnal protection. In this paper, we sysntesize developments advance understandings vs. nonequilibrium, homogeneity heterogeneity, determinism stochasticity, single-sclae phenomenon hierarchical linkages systems. integration patch dynamics with hierarchy theory led new perspectives spatial temporal dynamics, explicit linkage between heterogeneity. major elements include idea nested hirarchies mosaics, ecosystem as composite changes time space, pattern-process-scale perspecitve, nonequilibrium perspective, incorporation metastability. Both enviromental stochasticities biotic feedback interactions can cause instability contribute dynamcis observed various scales. Stabilizing mechanisms dampen destabilizing forces incorporation, environmental disturbances, biological compensatory mechanisms, absorpion. Hierarchical incorporates certain "emergent properties" system, such metastabilityor persistence at meta-scale, opposed transient local phenomena. contrast derives from an assumed self-regulation closed metastability deal explicity multiple-scale processes consequences most imporatant contribution lies framework provided explicitly incorporating scale, integrating equilibrium, multiple perspectives.

Язык: Английский

Процитировано

1223
Ecological Mechanisms and Landscape Ecology DOI

John A. Wiens,

Nils Chr. Stenseth,

Beatrice Van Horne

и другие.

Oikos, Год журнала: 1993, Номер 66(3), С. 369 - 369

Опубликована: Апрель 1, 1993

Landscape ecology deals with the effects of spatial configuration mosaics on a wide variety ecological phenomena. Because problems in many areas conservation biology and resource management are related to landscape use, development rigorous theoretical empirical foundation for is essential. We present an approach research that focuses how individual-level mechanisms operating heterogeneous mosaic produce patterns spatially dependent. The framework we develop considers density distribution population among patches as function (a) within-patch movement individuals; (b) emigration from density, patch configuration, context, movement; (c) loss individuals they disperse through elements

Язык: Английский

Процитировано

1086
The concept of scale and the human dimensions of global change: a survey DOI

Clark C. Gibson,

Элинор Остром,

T. K. Ahn

и другие.

Ecological Economics, Год журнала: 2000, Номер 32(2), С. 217 - 239

Опубликована: Фев. 1, 2000

Язык: Английский

Процитировано

1078
Land use change modelling: current practice and research priorities DOI
Peter H. Verburg, P.P. Schot, Martin Dijst

и другие.

GeoJournal, Год журнала: 2004, Номер 61(4), С. 309 - 324

Опубликована: Дек. 1, 2004

Язык: Английский

Процитировано

1022
The riverine ecosystem synthesis: biocomplexity in river networks across space and time DOI
James H. Thorp, Martin C. Thoms, Michael D. Delong

и другие.

River Research and Applications, Год журнала: 2006, Номер 22(2), С. 123 - 147

Опубликована: Фев. 1, 2006

Abstract We propose an integrated, heuristic model of lotic biocomplexity across spatiotemporal scales from headwaters to large rivers. This riverine ecosystem synthesis (RES) provides a framework for understanding both broad, often discontinuous patterns along longitudinal and lateral dimensions river networks local ecological various temporal smaller spatial scales. Rather than posing completely new model, we arrange conceptual marriage eco‐geomorphology (ecological aspects fluvial geomorphology) with terrestrial landscape describing hierarchical patch dynamics. modify five components this ecosystems: (1) nested, hierarchies mosaics; (2) dynamics as composite intra‐ inter‐patch dynamics; (3) linked processes; (4) dominance non‐equilibrial stochastic (5) formation quasi‐equilibrial, metastable state. Our blends our perspectives on aquatic models proposed 1980–2004. Contrasting common view rivers continuous, gradients in physical conditions, the RES portrays downstream arrays hydrogeomorphic patches (e.g. constricted, braided floodplain channel areas) formed by catchment geomorphology climate. The distribution these patches, which are identifiable using standard geomorphic techniques, varies amongst is difficult forecast above ecoregional Some types may reoccur passage. Unique ‘functional process zones’ individual because physiochemical habitat differences affect structure function. currently includes 14 tenets predicting how species distributions, community regulation, processes, interactions will vary over scales, especially they relate functional zones network. Copyright © 2006 John Wiley & Sons, Ltd.

Язык: Английский

Процитировано

889
Landscape influences on stream biotic integrity assessed at multiple spatial scales DOI

N. Roth,

J. David Allan,

Donna L. Erickson

и другие.

Landscape Ecology, Год журнала: 1996, Номер 11(3), С. 141 - 156

Опубликована: Июнь 1, 1996

Язык: Английский

Процитировано

809
Habitat selection at multiple scales DOI
Stephen J. Mayor, David C. Schneider, James A. Schaefer

и другие.

Ecoscience, Год журнала: 2009, Номер 16(2), С. 238 - 247

Опубликована: Июнь 1, 2009

Habitat selection is the disproportionate use of available conditions and resources, involves responses in space time to perceived risks rewards. It frequently depends on scale measurement, often non-linear ways that preclude simple extrapolation across scales. More critically, animals select different habitat components at scales, species vary their scales selection. Although multi-scaled research has proliferated, synthesis this work been impeded by imprecise terminology arbitrarily defined analytical Here, we review key concepts findings evaluate future prospects opened up part new technologies enable novel more efficient data collection. Innovative combined with approaches, permits be investigated a broad continuum By linking fitness as function scale, use-of-habitat assessments can effective. The costs benefits change scale; may inform us limiting factors. We outline how reward/risk ratios used assess implications

Язык: Английский

Процитировано

468
Biological Integrity versus Biological Diversity as Policy Directives DOI
Paul L. Angermeier, James R. Karr

BioScience, Год журнала: 1994, Номер 44(10), С. 690 - 697

Опубликована: Ноя. 1, 1994

Journal Article Biological Integrity versus Diversity as Policy Directives: Protecting biotic resources Get access Paul L. Angermeier, Angermeier Search for other works by this author on: Oxford Academic Google Scholar James R. Karr BioScience, Volume 44, Issue 10, November 1994, Pages 690–697, https://doi.org/10.2307/1312512 Published: 01 1994

Язык: Английский

Процитировано

451
Modeling Complex Ecological Economic Systems DOI
Robert Costanza, Lisa Wainger, Carl Folke

и другие.

BioScience, Год журнала: 1993, Номер 43(8), С. 545 - 555

Опубликована: Сен. 1, 1993

Journal Article Modeling Complex Ecological Economic Systems: Toward an evolutionary, dynamic understanding of people and nature Get access Robert Costanza, Costanza Search for other works by this author on: Oxford Academic Google Scholar Lisa Wainger, Wainger Carl Folke, Folke Karl-Göran Mäler BioScience, Volume 43, Issue 8, September 1993, Pages 545–555, https://doi.org/10.2307/1311949 Published: 01 1993

Язык: Английский

Процитировано

434