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Population estimation with sparse data: The role of estimators versus indices revisited

The use of indices to evaluate small-mammal populations has been heavily criticized, yet a review of small-mammal studies published from 1996 through 2000 indicated that indices are still the primary methods employed for measuring populations. The literature review also found that 98% of the samples collected in these studies were too small for reliable...

https://www.fs.usda.gov/treesearch/search?keywords=%22estimation%22&%3Bamp%3Bf%5B0%5D=author_facet%3A%22Miller%2C%20Ina%20Sue%22&%3Bpage=4&f%5B0%5D=author_facet%3A%22Frank%2C%20John%22&f%5B1%5D=author_facet%3A%22Lilleskov%2C%20Erik%22&f%5B2%5D=author_facet%3A%22Gobster%2C%20Paul%22&f%5B3%5D=author_facet%3A%22Vasievich%2C%20J.%20Michael%22&f%5B4%5D=author_facet%3A%22Mercer%2C%20D.%20Evan%22&f%5B5%5D=author_facet%3A%22Gray%2C%20James%22&f%5B6%5D=author_facet%3A%22Pearson%2C%20Dean%22

Author(s):

Kevin S. McKelvey; Dean E. Pearson

Year:

2001

Keywords:

population estimation, data, indices, estimators, small mammals

Source:

Canadian Journal of Zoology. 79(10): 1754-1765.

Forest ecosystem respiration estimated from eddy covariance and chamber measurements under high turbulence and substantial tree mortality from bark beetles

Eddy covariance nighttime fluxes are uncertain due to potential measurement biases. Many studies report eddy covariance nighttime flux lower than flux from extrapolated chamber measurements, despite corrections for low turbulence. We compared eddy covariance and chamber estimates of ecosystem respiration at the GLEES Ameriflux site over seven growing seasons under high...

Author(s):

Heather N. Speckman; John M. Frank; John B. Bradford; Brianna L. Miles; William J. Massman; William J. Parton; Michael G. Ryan

Year:

2015

Keywords:

bark beetles, chambers, disturbance, EC, ecosystem respiration, respiration modeling, soil efflux, turbulence, u* filtering

Source:

Global Change Biology. 2: 708-721.

Evaluating alternative prescribed burning policies to reduce net economic damages from wildfire

We estimate a wildfire risk model with a new measure of wildfire output, intensity-weighted risk and use it in Monte Carlo simulations to estimate welfare changes from alternative prescribed burning policies. Using Volusia County, Florida as a case study, an annual prescribed burning rate of 13% of all forest lands maximizes net welfare; ignoring the effects on...

Author(s):

D. Evan Mercer; Jeffrey P. Prestemon; David T. Butry; John M. Pye

Year:

2007

Keywords:

policy, prescribed fire, stochastic dominance, wildfire

Source:

Amer. J. Agr. Econ., Vol. 89(1): 63-77

Peatland carbon stocks and accumulation rates in the Ecuadorian páramo

The páramo is a high altitude tropical Andean ecosystem that contains peatlands with thick horizons of carbon (C) dense soils. Soil C data are sparse for most of the pa´ramo, especially in peatlands, which limits our ability to provide accurate regional and country wide estimates of C storage. Therefore, the objective of our research was to quantify belowground C...

Author(s):

John A. Hribljan; Esteban Suarez; Katherine A. Heckman; Erik Lilleskov; Rodney A. Chimner

Year:

2016

Keywords:

Peatland, Paramo, Carbon, Accumulation rates, Tuberas

Source:

Wetlands and Ecological Management. 24(2): 113:127.

Terrestrial water fluxes dominated by transpiration: Comment

The fraction of evapotranspiration (ET) attributed to plant transpiration (T) is an important source of uncertainty in terrestrial water fluxes and land surface modeling (Lawrence et al. 2007, Miralles et al. 2011). Jasechko et al. (2013) used stable oxygen and hydrogen isotope ratios from 73 large lakes to investigate the relative roles of evaporation (E) and T in ET...

Author(s):

Daniel R. Schlaepfer; Brent E. Ewers; Bryan N. Shuman; David G. Williams; John M. Frank; William J. Massman; William K. Lauenroth

Year:

2014

Keywords:

evapotranspiration (ET), plant transpiration (T), terrestrial water fluxes, land surface modeling

Source:

Ecosphere. 5(5): Article 61.

Estimating belowground carbon stocks in peatlands of the Ecuadorian páramo using ground-penetrating radar (GPR)

The páramo ecoregion of Ecuador contains extensive peatlands that are known to contain carbon (C) dense soils capable of long-term C storage. Although high-altitude mountain peatlands are typically small when compared to low-altitude peatlands, they are abundant across the Andean landscape and are likely a key component in regional C cycling. Since efforts to quantify...

Author(s):

Xavier Comas; Neil Terry; John A. Hribljan; Erik A. Lilleskov; Esteban Suarez; Rodney A. Chimner; Randy K. Kolka

Year:

2017

Keywords:

Source:

Biogeosciences. 122. 17 p.

A Real Options Method for Estimating the Adoption Potential of Forestry and Agroforestry Systems on Private Lands in the Lower Mississippi Alluvial Valley, USA

The Lower Mississippi River Alluvial Valley (LMAV), once was the largest forested bottom-land area in the continental United States, but has undergone widespread loss of forest through conversion to farmland. Restoration of forest functions and values has been a key conservation goal in the LMAV since the 1970s. This study utilizes a partial differential real options...

Author(s):

Gregory E. Frey; D. Evan Mercer; Frederick W. Cubbage; Robert C. Abt

Year:

2010

Keywords:

real options, agroforestry, adoption, alley cropping

Source:

In: Proceedings: XIII Wourld Forestry Congress. Buenos Aires, Argentina: 18-23 October 2009. 1-11.

Economic potential of agroforestry and forestry in the lower Mississippi Alluvial Valley with incentive programs and carbon payments

Conversion of bottomland hardwood forests in the Lower Mississippi Alluvial Valley (LMAV) to agricultural land has caused a loss of ecosystem services. The primary approaches to reverse this have been the Wetlands Reserve Program and the Conservation Reserve Program, which provide financial incentives to landowners to reforest. However, other forest production regimes...

Author(s):

Gregory E. Frey; D. Evan Mercer; Frederick W. Cubbage; Robert C. Abt

Year:

2011

Keywords:

soil expectation value, net present value, carbon emissions reductions, Wetlands Reserve Program, Lower Mississippi Alluvial Valley, bottomland hardwoods

Source:

Southern Journal of Applied Forestry 34(4):176-185

The Economic Value of Mangroves: A Meta-Analysis

This paper presents a synthesis of the mangrove ecosystem valuation literature through a meta-regression analysis. The main contribution of this study is that it is the first meta-analysis focusing solely on mangrove forests, whereas previous studies have included different types of wetlands. The number of studies included in the regression analysis is 44 for a total...

Author(s):

Marwa Salem; D. Evan Mercer

Year:

2012

Keywords:

mangroves, meta-regression analysis, nonmarket valuation

Source:

Sustainability 4:359-383

How well can we measure the vertical wind speed? Implications for fluxes of energy and mass

Sonic anemometers are capable of measuring the wind speed in all three dimensions at high frequencies (1050 Hz), and are relied upon to estimate eddy-covariance-based fluxes of mass and energy over a wide variety of surfaces and ecosystems. In this study, wind-velocity measurement errors from a three-dimensional sonic anemometer with a nonorthogonal transducer...

Author(s):

John Kochendorfer; Tilden P. Meyers; John Frank; William J. Massman; Mark W. Heuer

Year:

2012

Keywords:

(Co)sine correction, eddy covariance, energy budget closure, greenhouse gas emissions, sonic anemometer angle-of-attack correction, surface-atmosphere exchange

Source:

Boundary-Layer Meteorology. 145: 383-398.

Energy Expenditure associated with the use of neighborhood parks in 2 cities

Context: Availability of public neighborhood parks is associated with physical activity. Little is known about how parks contribute to population energy balance. Purpose: This study estimated energy expenditure associated with the use of neighborhood parks and compared energy expenditure by activity areas within parks and by neighborhood race/ethnicity and income....

Author(s):

Luis J. Suau; Myron F. Floyd; John O. Spengler; Jay E. Maddock; Paul H. Gobster

Year:

2012

Keywords:

energy expenditure, physical activity, population energy balance, public parks

Source:

Journal of Public Health Management and Practice

Mapping peatlands in boreal and tropical ecoregions

Peatlands are a class of wetlands that are defined as having saturated soils, anaerobic conditions, and large deposits of partially decomposed organic plant material (peat). Occurring in ecozones from the tropics to the arctic, peatlands are estimated to cover just under 4.5 million km², roughly 3?5% of the Earth's land surface (Maltby and...

Author(s):

L.L. Bourgeau-Chavez; S.L. Endres; J.A. Graham; J.A. Hribljan; R.A. Chimner; E.A. Lillieskov; M.J. Battaglia

Year:

2018

Keywords:

Source:

In: Liang, S., ed. Comprehensive Remote Sensing, vol. 6. Oxford, UK: Elsevier: 24–44.

Decline of arbuscular mycorrhizal fungi in northern hardwood forests exposed to chronic nitrogen additions

Arbuscular mycorrhizal (AM) fungi are important below-ground carbon (C) sinks that can be sensitive to increased nitrogen (N) availability. The abundance of AM fungi (AMF) was estimated in maple (Acer spp.) fine roots following more than a decade of experimental additions of N designed to simulate chronic atmospheric N deposition.

Author(s):

Linda T.A. van Diepen; Erik A. Lilleskov; Kurt S. Pregitzer; R. Michael Miller

Year:

2007

Keywords:

Acer saccharum (sugar maple), arbuscular mycorrhizal fungi (AMF), neutral lipid fatty acid (NLFA), nitrogen deposition, phospholipid fatty acid (PLFA), staining

Source:

New Phytologist. 176: 175-183.

Effect of a controlled burn on the thermophysical properties of a dry soil using a new model of soil heat flow and a new high temperature heat flux sensor

Some fires can be beneficial to soils but, if a fire is sufficiently intense, soil can be irreversible altered. We measured soil temperatures and heat fluxes at several soil depths before, during, and after a controlled surface burn at Manitou Experimental Forest (southern Colorado, USA) to evaluate its effects on the soil's thermophysical properties (thermal...

Author(s):

W. J. Massman; J. M. Frank

Year:

2004

Keywords:

fuel management, modeling periodic soil heat flow, slash, soil heat flux measurements during fires, soil thermal conductivity, soil volumetric specific heat capacity

Source:

International Journal of Wildland Fire. 13: 427-442.

Where are the Black Walnut Trees in Ohio? 1996.

Production of high-quality hardwoods is important in Ohio and black walnut ranks as one of the most valuable tree species in the State along with cherry, white and red oak, and ash. Ohio has more walnut growing stock volume than any other state, according to the most recently completed forest inventories in the East. The fourth and most recent measurement of Ohio?s...

Author(s):

J. Michael Vasievich; Neal P. Kingsley

Year:

1996

Keywords:

Fine hardwood, forest inventory.

Source:

Walnut Council Bulletin. 23(2): 1-5. [Zionsville, IN]

Forests and People in the Mid-Atlantic Region

Human populations in the Mid-Atlantic region over the last 250 years have increased nearly 100-fold, from an estimated few hundred thousand people to over 30 million people (Mercer and Murthy 2000). Increased population growth usually results in the conversion of forestland to nonforest uses, particularly agriculture, pastureland, and urban development. Not only is the...

Author(s):

Stephanie Fulton; Evan Mercer; M. Patricia Bradley

Year:</