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Estimating plant biomass in early-successional subtropical vegetation using a visual obstruction technique

Aim: Non-destructive methods for quantifying above-ground plant biomass are important tools in many ecological studies and management endeavours, but estimation methods can be labour intensive and particularly difficult in structurally diverse vegetation types. We aimed to develop a low-cost, but reasonably accurate, estimation technique within early-successional...

https://www.fs.usda.gov/treesearch/search?keywords=%22estimation%22&%3Bamp%3Bf%5B0%5D=author_facet%3A%22Thompson%2C%20Craig%22&%3Bf%5B0%5D=year%3A%221969%22&f%5B0%5D=author_facet%3A%22Moghaddas%2C%20Emily%22&f%5B1%5D=author_facet%3A%22Wunderle%2C%20Joseph%22&f%5B2%5D=author_facet%3A%22Stevens%2C%20Jack%22&f%5B3%5D=author_facet%3A%22Chong%2C%20Joey%22&f%5B4%5D=author_facet%3A%22Urbanik%2C%20Thomas%22&f%5B5%5D=author_facet%3A%22Silva%2C%20Bruno%22&f%5B6%5D=author_facet%3A%22Oishi%2C%20Andrew%20C.%22

Author(s):

Genie M. Fleming; Joseph M. Wunderle; David N. Ewert; Joseph O'Brien

Year:

2014

Keywords:

Source:

Applied Vegetation Science

A state-space modeling approach to estimating canopy conductance and associated uncertainties from sap flux density data

Uncertainties in ecophysiological responses to environment, such as the impact of atmospheric and soil moisture conditions on plant water regulation, limit our ability to estimate key inputs for ecosystem models. Advanced statistical frameworks provide coherent methodologies for relating observed data, such as stem sap flux density, to unobserved processes, such as...

Author(s):

David M. Bell; Eric J. Ward; A. Christopher Oishi; Ram Oren; Paul G. Flikkema; James S. Clark; David Whitehead

Year:

2015

Keywords:

canopy conductance, hierarchical Bayesian model, sap flux, transpiration

Source:

Tree Physiology. 35(7): 792-802.

Brooklyn's urban forest

An assessment of trees in Brooklyn, New York, reveal that this borough has approximately 610,000 trees with canopies that cover 11.4 percent of the area. The most common trees are estimated to be tree of heaven, white mulberry, black locust, Norway maple and black cherry. Brooklyn's trees currently store approximately 172,000 metric tons of carbon with an...

Author(s):

David J. Nowak; Daniel E. Crane; Jack C. Stevens; Myriam Ibarra

Year:

2002

Keywords:

urban forestry, carbon sequestration, global climate change, air quality, air pollution

Source:

Gen. Tech. Rep. NE-290. Newtown Square, PA: U. S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station 107 p.

Duration and rate of spring migration of Kirtland’s Warblers

The duration of migration of the endangered Kirtland?s Warbler (Setophaga kirtlandii) has not been previously documented. We estimated the average duration of spring migration for five male Kirtland?s Warblers by observing uniquely color-banded individuals at or near both the beginning and end of spring migration in Eleuthera, The Bahamas, and Michigan, respectively....

Author(s):

David N. Ewert; Kimberly R. Hall; Jr. Wunderle; Dave Currie; Sarah M. Rockwell; Scott B. Johnson; Jennifer D. White

Year:

2012

Keywords:

endangered species, Kirtland's Warbler, migration, Caribbean, Michigan, Setophaga kirtlandii

Source:

Wilson Journal of Ornithology. 124(1):9-14

Assessing market power in the U.S. pulp and paper industry

This paper assesses the market power of pulpwood mills in di?erent regions of the U.S. We estimated the conjectural elasticity, elasticities of substitution and price elasticities for the delivered price at the mill in Southeast and North U.S. and the stumpage in the Southeast. We assembled data composed of price and quantity of Labor, Energy, Chemical...

Author(s):

Bruno Kanieski Silva; Frederick W. Cubbage; Ronalds Gonzalez; Robert C. Abt

Year:

2019

Keywords:

Conjectural elasticities Pulpwood market Southern U.S. Market power

Source:

Forest Policy and Economics

Ecophysiological variation of transpiration of pine forests: synthesis of new and published results

Canopy transpiration (E_C) is a large fraction of evapotranspiration, integrating physical and biological processes within the energy, water, and carbon cycles of forests. Quantifying E_C is of both scientific and practical importance, providing information relevant to...

Author(s):

Pantana Tor-ngern; Ram Oren; Andrew C. Oishi; Joshua M. Uebelherr; Sari Palmroth; Lasse Tarvainen; Mikaell Ottosson-Löfvenius; Sune Linder; Jean-Christophe Domec; Torgny Näsholm

Year:

2017

Keywords:

Canopy transpiration, leaf area index, Pinus sylvestris, Pinus taeda, relative extractable water, soil texture, vapor pressure deficit

Source:

Ecological Applications

Census Methods for Caribbean Land Birds

Different census methods can be used to survey the distribution of a terrestrial bird species or to monitor population changes. The appropriate method depends on whether the objective is simply to document the presence of a species or to quantify its relative abundance, population density, population trends over time, habitat use, survivorship, or the physical...

Author(s):

Joseph M. Wunderle

Year:

1994

Keywords:

Source:

Gen. Tech. Rep. SO-98. New Orleans, LA: U.S. Dept of Agriculture, Forest Service, Southern Forest Experiment Station. 26 p.

Effect of plot and sample size on timing and precision of urban forest assessments

Accurate field data can be used to assess ecosystem services from trees and to improve urban forest management, yet little is known about the optimization of field data collection in the urban environment. Various field and Geographic Information System (GIS) tests were performed to help understand h