Utility and limitations of species richness metrics for conservation planning

Fleishman, Erica; Noss, Reed F.; Noon, Barry R.

doi:10.1016/j.ecolind.2005.07.005

Cited by 249 publications

(179 citation statements)

References 89 publications

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“…(Fleishman et al 2006). Además, según los resultados, cuando no hay una compensación entre estos procesos, la riqueza comunitaria cambia su valor.…”

Section: Discussionunclassified

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Dinámica temporal y espacial de una comunidad de aves en un gradiente altitudinal de la Cordillera Volcánica Central de Costa Rica, vertiente Caribe

Gómez

2017

Caldasia

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Ecología Dinámica temporal y espacial de una comunidad de aves en un gradiente altitudinal de la Cordillera Volcánica Central de Costa Rica, vertiente CaribeTemporal and spatial dynamics of a bird community along an altitudinal gradient on the Caribbean slope of the Cordillera Volcánica Central of Costa Rica camilo loaiza-g. Silvestre, Universidad Nacional, Apartado 1350-3000, Heredia, Costa Rica. cloaiza_81@yahoo.com RESUMEN La conservación y manejo de la biodiversidad requieren evaluaciones precisas del número y dinámica de las especies en las comunidades. Se estimó la riqueza de aves a 100, 200, 400 y 500 m en el transecto Volcán Barva -La Selva, Cordillera Volcánica Central de Costa Rica, vertiente Caribe entre los años 2004 y 2009. Se comparó la riqueza entre las elevaciones 100 m y 500 m y se estimó la probabilidad de que especies de una elevación ocurran en otra. La mayor riqueza se da a los 500 m. La probabilidad de que especies de estrato de 100 m ocurran en el de 500 m es del 92% (IC95%: 78,56% -100%) y de que especies de 500 m ocurran a 100 m es del 68% (IC95%: 56,35% -82,53%). Además, se calcularon para 2005, 2006, 2007 y 2008, la riqueza, la probabilidad de extinción local y tasa de colonización local. La comunidad presenta incremento de la riqueza anual con un pico en el año 2007 seguido de un decrecimiento hasta el 2008. En el período 2005-2008 se da un equilibrio dinámico con una mayor proporción de extinciones locales (tasa de extinción local de 7%) que proporción de colonizaciones locales (tasa de colonización de 5%). La entrada y salida de migratorias latitudinales altera esta tendencia. A 500 m se espera mayor representatividad de grupos tróficos de aves al ser el más diverso, sin embargo, se debe proteger y mantener la integridad del gradiente para mantener la comunidad de aves. Instituto Internacional en Conservación y Manejo de VidaPalabras clave. Ecología de comunidades, estación biológica La Selva, Parque Nacional Braulio Carrillo, riqueza de especies. ABSTRACTConservation and management of biodiversity requires an accurate assessment of the dynamics and number of species in a given community. Between 2004 and 2009, bird richness was estimated along the Volcán Barva-La Selva transect on the Caribbean slope of the Cordillera Volcánica Central of Costa Rica at 100, 200, 400 and 500 m elevation. Species richness was compared between 100m and 500m and the probability that species from one altitude occurred at another was also estimated. The highest richness values were found at 500 m. The probability that a species that occurs at 100 m also occurs at 500 m was 92% (95% CI: 78.56% -100%) and the probability that a species found at 500 m also occurs at 100 m was 68% (95% CI: 56.35% -82.53%). Additionally, the richness and probabilities of local extinction and local colonization were estimated for the years 2005, 2006, 2007, and 2008. The community presented a trend towards increased annual richness with the highest point in 2007 followed by a decrease in 2008. During the period 2005-2008 th...

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“…(Fleishman et al 2006). Además, según los resultados, cuando no hay una compensación entre estos procesos, la riqueza comunitaria cambia su valor.…”

Section: Discussionunclassified

“…Incluso con tasas constantes, los procesos ecológicos no son estáticos y existe un recambio en la composición de especies. Así, la variación temporal en las tasas de extinción y colonización representa una fuente adicional de variabilidad tanto en el valor de la riqueza de especies como en la composición de especies (Fleishman et al 2006).…”

Section: Introduccionunclassified

Dinámica temporal y espacial de una comunidad de aves en un gradiente altitudinal de la Cordillera Volcánica Central de Costa Rica, vertiente Caribe

Gómez

2017

Caldasia

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“…The 20 quadrats per site were summed, and the mean value was used to calculate a mean percentage cover value for each species per site. To address the limitations with species richness metrics (Fleishman et al, 2006), both Shannon diversity index (H′) and effective species richness (expH′) (Jost, 2006) were calculated from the relative abundance data. Effective species richness represents the true diversity rather than an index of diversity; thus, a community with an effective richness of 2.0 is considered twice as diverse as a community with an effective richness of 1.0.…”

Section: Site Selectionmentioning

confidence: 99%

A comparison of grassland vegetation from three agri-environment conservation measures

hUallacháin¹,

Finn²,

Keogh³

et al. 2016

Irish Journal of Agricultural and Food Research

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Semi-natural grassland habitats have declined significantly throughout Europe. To halt the decline, grassland conservation measures have been included in most European agri-environment schemes. This is the first study to compare the botanical composition of grassland habitats managed under the Irish Agri-Environment Options Scheme (AEOS). Sixty fields on drystock pastoral farms in receipt of agri-environment payments for grassland conservation were surveyed, with 20 fields being enrolled in each of the following AEOS options: Traditional Hay Meadow (THM), Species-Rich Grassland (SRG) and Natura 2000 species-rich grassland (Natura). The vegetation quality of sites enrolled in the Natura measure was higher than the quality of those enrolled in the THM and SRG measures. Natura sites had the greatest species richness, with a mean >40 species per site, which included approximately 17 species indicative of high botanical quality. Traditional Hay Meadows sites had the lowest species richness (mean: 29 species per site) and were dominated by species associated with improved grassland. Some THM sites had good levels of botanical richness and were similar in composition to Natura sites, with some Natura sites having lower vegetation quality, more similar to that of THM sites. Species-Rich Grassland had botanical richness that was intermediate between THM and Natura sites. A thorough assessment of the effectiveness of these measures was confounded by a lack of quantitative objectives for the target community composition to be attained. We discuss limitations and potential opportunities regarding the design, targeting, implementation and cost-effectiveness of these agri-environment measures.

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“…Community summary statistics have been criticized for potentially hiding more than they reveal (Lamb et al, 2009), and species richness, in particular, is criticized for treating all species the same (Fleishman et al, 2006). Species differ in conservation concern, in degree of habitat specialization, and in regional habitat occupancy.…”

Section: Introductionmentioning

confidence: 99%

Comparison of bird community indices for riparian restoration planning and monitoring

Young

Ammon

Dilts

et al. 2013

Ecological Indicators

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Young, Jock S.; Ammon, Elisabeth M.; Weisberg, Peter J.; Dilts, Thomas E.; Newton, Wesley E.; Wong-Kone, Diane C.; and Heki, Lisa G., "Comparison of bird community indices for riparian restoration planning and monitoring" (2013 a b s t r a c tThe use of a bird community index that characterizes ecosystem integrity is very attractive to conservation planners and habitat managers, particularly in the absence of any single focal species. In riparian areas of the western USA, several attempts at arriving at a community index signifying a functioning riparian bird community have been made previously, mostly resorting to expert opinions or national conservation rankings for species weights. Because extensive local and regional bird monitoring data were available for Nevada, we were able to develop three different indices that were derived empirically, rather than from expert opinion. We formally examined the use of three species weighting schemes in comparison with simple species richness, using different definitions of riparian species assemblage size, for the purpose of predicting community response to changes in vegetation structure from riparian restoration. For the three indices, species were weighted according to the following criteria: (1) the degree of riparian habitat specialization based on regional data, (2) the relative conservation ranking of landbird species, and (3) the degree to which a species is under-represented compared to the regional species pool for riparian areas. To evaluate the usefulness of these indices for habitat restoration planning and monitoring, we modeled them using habitat variables that are expected to respond to riparian restoration efforts, using data from 64 sampling sites in the Walker River Basin in Nevada and California. We found that none of the species-weighting schemes performed any better as an index for evaluating overall habitat condition than using species richness alone as a community index. Based on our findings, the use of a fairly complete list of 30-35 riparian specialists appears to be the best indicator group for predicting the response of bird communities to the restoration of riparian vegetation.

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Utility and limitations of species richness metrics for conservation planning

Cited by 249 publications

References 89 publications

Dinámica temporal y espacial de una comunidad de aves en un gradiente altitudinal de la Cordillera Volcánica Central de Costa Rica, vertiente Caribe

Dinámica temporal y espacial de una comunidad de aves en un gradiente altitudinal de la Cordillera Volcánica Central de Costa Rica, vertiente Caribe

A comparison of grassland vegetation from three agri-environment conservation measures

Comparison of bird community indices for riparian restoration planning and monitoring

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