Acid Rain Impacts on Calcium Nutrition and Forest Health

DeHayes, Donald H.; Schaberg, Paul G.; Hawley, Gary J.; Strimbeck, G. R.

doi:10.2307/1313570

Cited by 238 publications

(156 citation statements)

References 55 publications

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“…It has been reported that the size of maxillary alveolar arch increases with the variations in the food habits [28]. Cambisols and Chernozems cover most of the land area viz., 26.72% and 9.00%, respectively [32]. Chernozems are predominantly found in Russia also [33].…”

Section: Discussionmentioning

confidence: 97%

Soil pH as a Phenotype Determinant in Humans: Proposing a Scientific Hypothesis

Barthakur¹

2018

OJSS

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Plant growth, habitat of various microorganisms, sustenance conditions for the fauna and flora, are determined by the quality of soil. However, alteration in the properties of soil leads to various deficiencies/diseases in plants and thereby affects dependent fauna. The alkalinity and acidity of the soil refer to the change in pH value of the soil. In the North East India, most of the soils lack calcium (Ca) and are acidic. Therefore, majority of the fauna and flora have lower availability of Ca due to leaching, caused by the heavy rainfall. The present study hypothesizes that the life originating from areas deficient in Ca, impacts their bone concentration and facial formation. This makes them phenotypically distinct from their counterparts residing in the other regions which have alkaline soils or have the optimum pH value of soil. Strongly acidic soils, might have led to the formation of the major Mongolian Race in humans.

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Section: Discussionmentioning

confidence: 97%

Soil pH as a Phenotype Determinant in Humans: Proposing a Scientific Hypothesis

Barthakur¹

2018

OJSS

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“…The influence of acidinduced depletion of available Ca in soil on red spruce foliar winter injury (freeze-induced mortality) provides an important case study. Laboratory-based research had implicated acid-induced available Ca loss in predisposing red spruce to increased foliar freezing injury (e.g., DeHayes et al 1999). However, it was not until the severe 2003 region-wide winter injury event that field measurements verified the connection between available Ca depletion and foliar injury.…”

Section: Experiments At Intensive Sitesmentioning

confidence: 99%

The promise and peril of intensive‐site‐based ecological research: insights from the Hubbard Brook ecosystem study

Fahey

Templer

Anderson

et al. 2015

Ecology

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Abstract. Ecological research is increasingly concentrated at particular locations or sites. This trend reflects a variety of advantages of intensive, site-based research, but also raises important questions about the nature of such spatially delimited research: how well does site based research represent broader areas, and does it constrain scientific discovery? We provide an overview of these issues with a particular focus on one prominent intensive research site: the Hubbard Brook Experimental Forest (HBEF), New Hampshire, USA. Among the key features of intensive sites are: long-term, archived data sets that provide a context for new discoveries and the elucidation of ecological mechanisms; the capacity to constrain inputs and parameters, and to validate models of complex ecological processes; and the intellectual cross-fertilization among disciplines in ecological and environmental sciences. The feasibility of scaling up ecological observations from intensive sites depends upon both the phenomenon of interest and the characteristics of the site. An evaluation of deviation metrics for the HBEF illustrates that, in some respects, including sensitivity and recovery of streams and trees from acid deposition, this site is representative of the Northern Forest region, of which HBEF is a part. However, the mountainous terrain and lack of significant agricultural legacy make the HBEF among the least disturbed sites in the Northern Forest region. Its relatively cool, wet climate contributes to high stream flow compared to other sites. These similarities and differences between the HBEF and the region can profoundly influence ecological patterns and processes and potentially limit the generality of observations at this and other intensive sites. Indeed, the difficulty of scaling up may be greatest for ecological phenomena that are sensitive to historical disturbance and that exhibit the greatest spatiotemporal variation, such as denitrification in soils and the dynamics of bird communities. Our research shows that end member sites for some processes often provide important insights into the behavior of inherently heterogeneous ecological processes. In the current era of rapid environmental and biological change, key ecological responses at intensive sites will reflect both specific local drivers and regional trends.

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“…Without an adequate supply of base cations, trees are susceptible to toxicity from Al in excessively acidic environments and from nutritional defi ciency of base cations. Consequences of base cation depletion include reduced cold tolerance and increased winter injury (DeHayes et al 1999, Schaberg et al 2000, crown dieback (Wilmot et al 1995), increased susceptibility to pest and disease (McLaughlin and Wimmer 1999), reduced regeneration, reduced growth and increased mortality (Schaberg et al 2002), and species composition changes.…”

Section: Base Cation Depletionmentioning

confidence: 99%

“…Recent research has made some advances in explaining the variability in tree response to high Ca:Al in soil solution. Instead of measuring total foliar Ca to determine whether a tree has a Ca defi ciency, as was done in the past, researchers have separated out functionally important Ca, known as membraneassociated calcium or mCa (DeHayes et al 1999). The variability in tree response to low Ca:Al in soil solution is greatly reduced when the functionally signifi cant plant Ca pool is measured rather than the largely structurally bound total Ca.…”

Section: Calcium To Aluminum Ratiomentioning

confidence: 99%

Approaches for estimating critical loads of N and S deposition for forest ecosystems on U.S. federal lands

Pardo¹

2010

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Projected emissions of sulfur and nitrogen are expected to have continuing negative impacts on forests, in spite of reductions in sulfur emissions as a result of SO 2 control programs. Sulfur and nitrogen emissions present serious long-term threats to forest health and productivity in the United States. This report is intended to explain the differences in approaches for calculating critical loads for forest ecosystems in Europe, Canada, and the United States; it is directed to air quality regulators and Federal Land Managers (FLMs) in the United States, and addresses concerns particular to U.S. Federal lands. The paper describes the basic mass balance approach for calculating critical loads, presents the various critical thresholds, and explains the assumptions inherent in the calculation and data selection procedure. The input necessary from FLMs in the process of estimating the critical load is described.

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Acid Rain Impacts on Calcium Nutrition and Forest Health

Cited by 238 publications

References 55 publications

Soil pH as a Phenotype Determinant in Humans: Proposing a Scientific Hypothesis

Soil pH as a Phenotype Determinant in Humans: Proposing a Scientific Hypothesis

The promise and peril of intensive‐site‐based ecological research: insights from the Hubbard Brook ecosystem study

Approaches for estimating critical loads of N and S deposition for forest ecosystems on U.S. federal lands

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