An Empirical Assessment and Comparison of Species-Based and Habitat-Based Surrogates: A Case Study of Forest Vertebrates and Large Old Trees
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{"title"=>"An empirical assessment and comparison of species-based and habitat-based surrogates: A case study of forest vertebrates and large old trees", "type"=>"journal", "authors"=>[{"first_name"=>"David B.", "last_name"=>"Lindenmayer", "scopus_author_id"=>"35510108300"}, {"first_name"=>"Philip S.", "last_name"=>"Barton", "scopus_author_id"=>"23476666800"}, {"first_name"=>"Peter W.", "last_name"=>"Lane", "scopus_author_id"=>"56067519100"}, {"first_name"=>"Martin J.", "last_name"=>"Westgate", "scopus_author_id"=>"35184437500"}, {"first_name"=>"Lachlan", "last_name"=>"McBurney", "scopus_author_id"=>"25637619400"}, {"first_name"=>"David", "last_name"=>"Blair", "scopus_author_id"=>"55697098300"}, {"first_name"=>"Philip", "last_name"=>"Gibbons", "scopus_author_id"=>"36160194700"}, {"first_name"=>"Gene E.", "last_name"=>"Likens", "scopus_author_id"=>"7006663244"}], "year"=>2014, "source"=>"PLoS ONE", "identifiers"=>{"issn"=>"19326203", "scopus"=>"2-s2.0-84896098779", "sgr"=>"84896098779", "pui"=>"372599093", "isbn"=>"1932-6203", "pmid"=>"24587050", "doi"=>"10.1371/journal.pone.0089807"}, "id"=>"fcd93de2-0a9d-3458-89ba-086e66ae83c1", "abstract"=>"A holy grail of conservation is to find simple but reliable measures of environmental change to guide management. For example, particular species or particular habitat attributes are often used as proxies for the abundance or diversity of a subset of other taxa. However, the efficacy of such kinds of species-based surrogates and habitat-based surrogates is rarely assessed, nor are different kinds of surrogates compared in terms of their relative effectiveness. We use 30-year datasets on arboreal marsupials and vegetation structure to quantify the effectiveness of: (1) the abundance of a particular species of arboreal marsupial as a species-based surrogate for other arboreal marsupial taxa, (2) hollow-bearing tree abundance as a habitat-based surrogate for arboreal marsupial abundance, and (3) a combination of species- and habitat-based surrogates. We also quantify the robustness of species-based and habitat-based surrogates over time. We then use the same approach to model overall species richness of arboreal marsupials. We show that a species-based surrogate can appear to be a valid surrogate until a habitat-based surrogate is co-examined, after which the effectiveness of the former is lost. The addition of a species-based surrogate to a habitat-based surrogate made little difference in explaining arboreal marsupial abundance, but altered the co-occurrence relationship between species. Hence, there was limited value in simultaneously using a combination of kinds of surrogates. The habitat-based surrogate also generally performed significantly better and was easier and less costly to gather than the species-based surrogate. We found that over 30 years of study, the relationships which underpinned the habitat-based surrogate generally remained positive but variable over time. Our work highlights why it is important to compare the effectiveness of different broad classes of surrogates and identify situations when either species- or habitat-based surrogates are likely to be superior.", "link"=>"http://www.mendeley.com/research/empirical-assessment-comparison-speciesbased-habitatbased-surrogates-case-study-forest-vertebrates-l", "reader_count"=>56, "reader_count_by_academic_status"=>{"Unspecified"=>3, "Professor > Associate Professor"=>4, "Researcher"=>20, "Student > Doctoral Student"=>3, "Student > Ph. D. Student"=>9, "Student > Postgraduate"=>2, "Student > Master"=>7, "Other"=>2, "Student > Bachelor"=>4, "Professor"=>2}, "reader_count_by_user_role"=>{"Unspecified"=>3, "Professor > Associate Professor"=>4, "Researcher"=>20, "Student > Doctoral Student"=>3, "Student > Ph. D. Student"=>9, "Student > Postgraduate"=>2, "Student > Master"=>7, "Other"=>2, "Student > Bachelor"=>4, "Professor"=>2}, "reader_count_by_subject_area"=>{"Unspecified"=>7, "Environmental Science"=>19, "Agricultural and Biological Sciences"=>27, "Physics and Astronomy"=>1, "Earth and Planetary Sciences"=>2}, "reader_count_by_subdiscipline"=>{"Physics and Astronomy"=>{"Physics and Astronomy"=>1}, "Earth and Planetary Sciences"=>{"Earth and Planetary Sciences"=>2}, "Agricultural and Biological Sciences"=>{"Agricultural and Biological Sciences"=>27}, "Unspecified"=>{"Unspecified"=>7}, "Environmental Science"=>{"Environmental Science"=>19}}, "reader_count_by_country"=>{"Canada"=>1, "United States"=>1, "Finland"=>1, "South Africa"=>1, "Mexico"=>1, "Chile"=>2, "France"=>1, "Australia"=>1, "Spain"=>1}, "group_count"=>2}

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Figshare

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  • {"files"=>["https://ndownloader.figshare.com/files/1396757"], "description"=>"<p>Estimated regression coefficients (with standard errors) in the fitted relationship between abundance of three species of marsupial and abundance of hollow-bearing trees, plotted over time, together with the associated mean numbers per site of hollow-bearing trees, and of each species of arboreal marsupial.</p>", "links"=>[], "tags"=>["ecology", "Ecological metrics", "Species diversity", "ecosystems", "Ecosystem modeling", "biodiversity", "Bioindicators", "Conservation science", "Population biology", "Population Dynamics", "statistics", "Biostatistics", "Statistical methods", "regression"], "article_id"=>943112, "categories"=>["Biological Sciences", "Mathematics"], "users"=>["David B. Lindenmayer", "Philip S. Barton", "Peter W. Lane", "Martin J. Westgate", "Lachlan McBurney", "David Blair", "Philip Gibbons", "Gene E. Likens"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0089807.g002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Estimated_regression_coefficients_/943112", "title"=>"Estimated regression coefficients.", "pos_in_sequence"=>0, "defined_type"=>1, "published_date"=>"2014-02-24 03:24:53"}
  • {"files"=>["https://ndownloader.figshare.com/files/1396758"], "description"=>"<p>Comparison of models using log-transformed counts of the explanatory variables (LP abundance of Leadbeater’s Possum, HBT abundance of hollow-bearing trees) fitted individually in negative binomial models for both target species in all four datasets (GG Greater Glider; MBP Mountain Brushtail Possum); the deviance is the change in –2 log(likelihood); the non-linear effect is the difference between a cubic smoothing spline with 2 d.f. and a linear model on the log scale; p-values are approximate because they are based on asymptotic properties.</p>", "links"=>[], "tags"=>["ecology", "Ecological metrics", "Species diversity", "ecosystems", "Ecosystem modeling", "biodiversity", "Bioindicators", "Conservation science", "Population biology", "Population Dynamics", "statistics", "Biostatistics", "Statistical methods", "log-transformed", "counts", "explanatory"], "article_id"=>943113, "categories"=>["Biological Sciences", "Mathematics"], "users"=>["David B. Lindenmayer", "Philip S. Barton", "Peter W. Lane", "Martin J. Westgate", "Lachlan McBurney", "David Blair", "Philip Gibbons", "Gene E. Likens"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0089807.t001"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_models_using_log_transformed_counts_of_the_explanatory_variables_/943113", "title"=>"Comparison of models using log-transformed counts of the explanatory variables.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-02-24 03:24:53"}
  • {"files"=>["https://ndownloader.figshare.com/files/1396759"], "description"=>"a<p>Significantly different from 0 at the 5% level.</p><p>Estimates of the regression coefficient for the effect of the habitat-based and of the species-based surrogates fitted jointly or separately in negative binomial models for both target species (GG Greater Glider; MBP Mountain Brushtail Possum) in all four datasets.</p>", "links"=>[], "tags"=>["ecology", "Ecological metrics", "Species diversity", "ecosystems", "Ecosystem modeling", "biodiversity", "Bioindicators", "Conservation science", "Population biology", "Population Dynamics", "statistics", "Biostatistics", "Statistical methods", "regression", "coefficient"], "article_id"=>943114, "categories"=>["Biological Sciences", "Mathematics"], "users"=>["David B. Lindenmayer", "Philip S. Barton", "Peter W. Lane", "Martin J. Westgate", "Lachlan McBurney", "David Blair", "Philip Gibbons", "Gene E. Likens"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0089807.t002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Estimates_of_the_regression_coefficient_for_target_species_/943114", "title"=>"Estimates of the regression coefficient for target species.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-02-24 03:24:53"}
  • {"files"=>["https://ndownloader.figshare.com/files/1396760"], "description"=>"<p>Expected abundance of Greater Glider (GG) and Mountain Brushtail Possum (MBP) in each dataset, from the model with a log-linear effect of number of hollow-bearing trees (HBT), for two selected values of the explanatory variable.</p>", "links"=>[], "tags"=>["ecology", "Ecological metrics", "Species diversity", "ecosystems", "Ecosystem modeling", "biodiversity", "Bioindicators", "Conservation science", "Population biology", "Population Dynamics", "statistics", "Biostatistics", "Statistical methods", "abundance", "glider", "brushtail"], "article_id"=>943115, "categories"=>["Biological Sciences", "Mathematics"], "users"=>["David B. Lindenmayer", "Philip S. Barton", "Peter W. Lane", "Martin J. Westgate", "Lachlan McBurney", "David Blair", "Philip Gibbons", "Gene E. Likens"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0089807.t003"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Expected_abundance_of_Greater_Glider_and_Mountain_Brushtail_Possum_/943115", "title"=>"Expected abundance of Greater Glider and Mountain Brushtail Possum.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-02-24 03:24:53"}
  • {"files"=>["https://ndownloader.figshare.com/files/1396761"], "description"=>"<p>The comparison uses log-transformed counts of the explanatory variables (LP abundance of Leadbeater’s Possum, HBT abundance of hollow-bearing trees) fitted individually.</p>", "links"=>[], "tags"=>["ecology", "Ecological metrics", "Species diversity", "ecosystems", "Ecosystem modeling", "biodiversity", "Bioindicators", "Conservation science", "Population biology", "Population Dynamics", "statistics", "Biostatistics", "Statistical methods", "binomial"], "article_id"=>943116, "categories"=>["Biological Sciences", "Mathematics"], "users"=>["David B. Lindenmayer", "Philip S. Barton", "Peter W. Lane", "Martin J. Westgate", "Lachlan McBurney", "David Blair", "Philip Gibbons", "Gene E. Likens"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0089807.t004"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_Comparison_of_negative_binomial_models_for_species_richness_/943116", "title"=>"Comparison of negative binomial models for species richness.", "pos_in_sequence"=>0, "defined_type"=>3, "published_date"=>"2014-02-24 03:24:53"}
  • {"files"=>["https://ndownloader.figshare.com/files/1396762", "https://ndownloader.figshare.com/files/1396763"], "description"=>"<div><p>A holy grail of conservation is to find simple but reliable measures of environmental change to guide management. For example, particular species or particular habitat attributes are often used as proxies for the abundance or diversity of a subset of other taxa. However, the efficacy of such kinds of species-based surrogates and habitat-based surrogates is rarely assessed, nor are different kinds of surrogates compared in terms of their relative effectiveness. We use 30-year datasets on arboreal marsupials and vegetation structure to quantify the effectiveness of: <b>(1)</b> the abundance of a particular species of arboreal marsupial as a species-based surrogate for other arboreal marsupial taxa, <b>(2)</b> hollow-bearing tree abundance as a habitat-based surrogate for arboreal marsupial abundance, and <b>(3)</b> a combination of species- and habitat-based surrogates. We also quantify the robustness of species-based and habitat-based surrogates over time. We then use the same approach to model overall species richness of arboreal marsupials. We show that a species-based surrogate can appear to be a valid surrogate until a habitat-based surrogate is co-examined, after which the effectiveness of the former is lost. The addition of a species-based surrogate to a habitat-based surrogate made little difference in explaining arboreal marsupial abundance, but altered the co-occurrence relationship between species. Hence, there was limited value in simultaneously using a combination of kinds of surrogates. The habitat-based surrogate also generally performed significantly better and was easier and less costly to gather than the species-based surrogate. We found that over 30 years of study, the relationships which underpinned the habitat-based surrogate generally remained positive but variable over time. Our work highlights why it is important to compare the effectiveness of different broad classes of surrogates and identify situations when either species- or habitat-based surrogates are likely to be superior.</p></div>", "links"=>[], "tags"=>["ecology", "Ecological metrics", "Species diversity", "ecosystems", "Ecosystem modeling", "biodiversity", "Bioindicators", "Conservation science", "Population biology", "Population Dynamics", "statistics", "Biostatistics", "Statistical methods", "empirical", "species-based", "habitat-based", "vertebrates"], "article_id"=>943117, "categories"=>["Biological Sciences", "Mathematics"], "users"=>["David B. Lindenmayer", "Philip S. Barton", "Peter W. Lane", "Martin J. Westgate", "Lachlan McBurney", "David Blair", "Philip Gibbons", "Gene E. Likens"], "doi"=>["https://dx.doi.org/10.1371/journal.pone.0089807.s001", "https://dx.doi.org/10.1371/journal.pone.0089807.s002"], "stats"=>{"downloads"=>0, "page_views"=>0, "likes"=>0}, "figshare_url"=>"https://figshare.com/articles/_An_Empirical_Assessment_and_Comparison_of_Species_Based_and_Habitat_Based_Surrogates_A_Case_Study_of_Forest_Vertebrates_and_Large_Old_Trees_/943117", "title"=>"An Empirical Assessment and Comparison of Species-Based and Habitat-Based Surrogates: A Case Study of Forest Vertebrates and Large Old Trees", "pos_in_sequence"=>0, "defined_type"=>4, "published_date"=>"2014-02-24 03:24:53"}

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Relative Metric

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