Plant communities of New Brunswick in relation to environmental variation

Roberts, Mark; Wuest, Lawrence

doi:10.2307/3237061

Cited by 15 publications

(16 citation statements)

References 26 publications

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“…Finally distribution patterns of the Charaxinae of YP were located projecting on the ordination diagram, a procedure to determine the optima of each species along the environmental variables (ter Braak 1986;Jongman et al 1995;Roberts & Wuest 1999;Leps & Smilaurer 2003).…”

Section: Methodsmentioning

confidence: 99%

Distribution patterns of charaxinae (Lepidoptera: Nymphalidae) in Yucatan Península, Mexico

Maya-Martínez

Pozo

Schmitter‐Soto

2009

AZM

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ABSTRACT. The objectives of this work were to ascertain which environmental, anthropogenic or geographic factors influence the present distribution of Charaxinae in Yucatan Peninsula and to identify distribution patterns which might be linked to biological conservation in the region. We obtained records from collections, literature and field, and analyzed the data with DCA and CCA. We analyzed both matrices, species data (17 species, 151 sites) and environmental data (11 independent variables, 151 sites). Six environmental, physiographic and anthropic descriptors, namely latitude, distance to Caribbean coast, mean annual temperature, distance to present-day urban settlements, altitude, and humidity were statistically significant. Distribution abundance of Charaxinae was higher towards north and south and lower in mid-latitude of the Yucatan Peninsula. We discerned five distribution patterns of Charaxinae in Yucatan Peninsula; each one formed by different species and with different optima along those six variables, confirming that seven species are indicative of conserved environments. We obtained distributional limits for some species according to latitude and humidity (Anaea troglodyta aidea). Key words: Biodiversity, butterflies, conservation, ecological biogeography, humidity gradient, indicator species, latitude, multivariate analysis.Maya-Martínez, A., C. Pozo y J. J. Schmitter-Soto. 2009. Patrones de distribución de Charaxinae (Lepidoptera: Nymphalidae) en la Península de Yucatán, México. Acta Zoológica Mexicana (n. s.), 25(2): 283-301. RESUMEN. El objetivo de este trabajo fue reconocer qué factores ecológicos, antrópicos o geográficos determinan la distribución actual de los Charaxinae en la península de Yucatán e identificar los patrones de distribución que sean útiles para la conservación biológica del la región. Se obtuvieron registros de colecciones biológicas, literatura y campo y se analizaron los datos por medio de DCA y CCA, a partir matrices de datos de especies (17 especies por 151 sitios) y de datos ambientales (11 variables 283 ISSN 0065-1737 Acta Zoológica Mexicana (n.s.) 25(2): 283-301 (2009) Recibido: 30/11/2007 aceptado: 24/03/2009 independientes por 151 sitios). Seis descriptores ecológicos, fisiográficos y antrópicos, denominados latitud, distancia a la costa del Caribe, temperatura, distancia a los centros urbanos actuales, altitud y humedad fueron estadísticamente significativos. La abundancia general de Charaxinae presentó una relación con la latitud de la Península, teniendo valores mayores hacía las latitudes extremas y una disminución hacia el centro. Se obtuvieron cinco patrones de distribución de los Charaxinae en la península de Yucatán, cada uno formado por diferentes especies y con diferentes óptimos a lo largo de las seis variables independientes seleccionadas, se confirmó que siete especies son indicadoras de ambientes conservados. Se obtuvieron límites de distribución para algunas de las especies según la latitud y la humedad, en particular para Anaea troglodyta aidea.

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Section: Methodsmentioning

confidence: 99%

Distribution patterns of charaxinae (Lepidoptera: Nymphalidae) in Yucatan Península, Mexico

Maya-Martínez

Pozo

Schmitter‐Soto

2009

AZM

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“…), and yellow birch (Betula alleghaniensis Britton) as dominant species (the Acer saccharum-Fagus grandifolia-Viburnum alnifolium community type, after Roberts andWuest 1999, McLaughlin 2000). Remeasurement of numbered trees occurred periodically through 2008.…”

Section: Methodsmentioning

confidence: 99%

Predicting future diameter of sugar maple in uneven-aged stands of west-central New Brunswick and New York

Swift

KiernanDiane

Bevilacqua

et al. 2012

The Forestry Chronicle

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We used data from uneven-aged research plots in west-central New Brunswick to validate a sugar maple (Acer saccharum Marsh.) diameter growth model initially developed from remeasured trees in single-tree selection system stands at two New York State locations. We also refitted the coefficients to fit the New Brunswick data and added variables to account for variation across locations and treatments among the New Brunswick plots. The original equation predicted future diameter for New Brunswick trees reasonably well, but a version with coefficients specific to New Brunswick proved more accurate. Adding variables that account for unique features of the New Brunswick data reinforced the notion that growth rates differ across locations, and also that post-cutting diameter growth varies with the intensity of release. Although the New York model and the general model with refitted coefficients unique to New Brunswick indicated that rates of growth do not change throughout a cutting cycle, equations having a variable to account for location of the New Brunswick research sites showed that growth decreased with time. Test results are presented.Key words: diameter growth, predicting future diameter, sugar maple, uneven-aged silviculture RÉSUMÉNous avons utilisé les données des parcelles de recherche établies dans des peuplements inéquiennes situés dans le centreouest du Nouveau-Brunswick pour valider le modèle de croissance en diamètre de l' érable à sucre (Acer saccharum Marsh.) initialement élaboré à partir d'arbres remesurés dans des peuplements traités par jardinage par arbre provenant de deux localisations situées dans l'État de New York. Nous avons également révisé les coefficients pour qu'ils soient adaptés aux données du Nouveau-Brunswick et nous avons ajouté des variables pour tenir compte de la variation entre la localisation et les traitements propres à chaque parcelle du Nouveau-Brunswick. L' équation originale prédisait le diamètre futur des arbres du Nouveau-Brunswick de façon acceptable, mais une version comprenant des coefficients spécifiques au Nouveau-Brunswick s' est avérée être plus précise. L'ajout de variables prenant en considération les caractéristiques uniques des données du Nouveau-Brunswick a renforcé la notion que les taux de croissance diffèrent entre les localisations et que, également, la croissance en diamètre après coupe varie selon l'intensité du dégagement. Même si le modèle de New York ainsi que le modèle général muni de coefficients uniques au Nouveau-Brunswick ont indiqué que les taux de croissance n' ont pas changé au cours du cycle de coupe, les équations ayant une variable tenant compte de la localisation des sites de recherche au Nouveau-Brunswick ont démontré que la croissance décline en fonction du temps. Les résultats des tests accompagnent cet article. For personal use only.

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“…In initial work, we examined vegetation-environment relationships at the landscape scale in New Brunswick (Godin and Roberts 1994). Roberts and Wuest (1999) was one of the first studies to quantitatively assess vegetation-environment relationships at the regional scale anywhere and the first quantitative analysis in eastern Canada. These two works are being used as the basis of the NB ecological land classification system (New Brunswick Department of Natural Resources, unpublished document on CD-ROM).…”

Section: Response Of the Herbaceous Layer To Disturbancementioning

confidence: 99%

Teaching and research in forest ecology at UNB, 1942 to present

Roberts¹

2008

The Forestry Chronicle

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The purposes of this paper are to review the history of forest ecology courses at the University of New Brunswick (UNB) in relation to the social context, summarize recent developments in forest ecology research at UNB, and identify critical areas for future research. Based on the UNB Undergraduate Calendar (1942 to present), the first forest ecology course was offered in 1957. Until the 1980s, forest ecology courses were generally related to silviculture and forest production. Since then, courses reflected increasing public concern with biodiversity and sustainable forest management. Research in the Forest Ecology Laboratory at UNB has emphasized forest ecosystem response to disturbance, including tree regeneration and herbaceous-layer recovery following silvicultural treatments. From this work, a disturbance severity model was developed for characterizing any kind of disturbance. Future research is needed to test the model across additional disturbance types, particularly new silvicultural treatments that are being used in forest ecosystem management.

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Plant communities of New Brunswick in relation to environmental variation

Cited by 15 publications

References 26 publications

Distribution patterns of charaxinae (Lepidoptera: Nymphalidae) in Yucatan Península, Mexico

Distribution patterns of charaxinae (Lepidoptera: Nymphalidae) in Yucatan Península, Mexico

Predicting future diameter of sugar maple in uneven-aged stands of west-central New Brunswick and New York

Teaching and research in forest ecology at UNB, 1942 to present

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