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1. Of or relating to soil, especially as it affects living organisms.
2. Associated with a particular type of soil: an edaphic plant community.

[From Greek edaphos, ground, soil; see sed- in Indo-European roots.]
American Heritage® Dictionary of the English Language, Fifth Edition. Copyright © 2016 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.


(Environmental Science) of or relating to the physical and chemical conditions of the soil, esp in relation to the plant and animal life it supports. Compare biotic2
[C20: from Greek edaphos bottom, soil]
eˈdaphically adv
Collins English Dictionary – Complete and Unabridged, 12th Edition 2014 © HarperCollins Publishers 1991, 1994, 1998, 2000, 2003, 2006, 2007, 2009, 2011, 2014


(ɪˈdæf ɪk)

related to or caused by particular soil conditions, as of texture or drainage, rather than physiographic or climatic factors.
[< German edaphisch (1898) < Greek édaph(os) ground, soil + German -isch]
e•daph′i•cal•ly, adv.
Random House Kernerman Webster's College Dictionary, © 2010 K Dictionaries Ltd. Copyright 2005, 1997, 1991 by Random House, Inc. All rights reserved.
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The edaphic macrofauna comprises the largest invertebrates (organisms larger than 10 mm in length or more than 2 mm in diameter) such as earthworms, larval and adult beetles, centipedes, termites, ants, snake lice (milipeias), tatuans e arachnids (Wolters, 2000; Lavelle and Spain, 2001).
This difference is expected since the slope aspect influences microclimatic (most importantly solar radiation and subsequently humidity) and edaphic conditions (Long 1957; Poore and Robertson 1964; Al-Eisawi 1985; Higazy et al.
According to Ding and He (2007) [48], there are two main effects of antibiotics on soil microbiota: (a) the first is related to microbial community disturbance, which in some cases may affect certain edaphic functions; and (b) the other considers the possible selection and transfer (vertical and horizontal) of resistant antibiotic genes.
Hence the importance of understanding edaphic organisms, of characterising them and quantifying their abundance.
To answer these, the following goals were stablished: a) to know the floristic composition and phytosociological structure in springs surroundings of Lower Highland Seasonal Forest; b) to verify the relation between the distribution of the species and edaphic variables; c) to verify the existence of species indicator groups for each spring; d) to indicate species for recovery of degraded springs.
The competition between microbial uptake and sorption by soil components, including mineral particles and soil organic matter, is of particular concern when targeting the sorption behaviour of specific organic analytes, particularly when abiotic edaphic properties need to be isolated.
Edaphic macroinvertebrates constitute an important component of soil belowground biodiversity and play a significant role in soil biological functioning and sustained productivity.
A second MFA was run separately to test the relationship of RSD, edaphic conditions and land use with locust population density.
Plants found on 'extreme' soils, those characterized by unusual chemical (pH, ionic strength, nutrients, or heavy metals) or physical conditions (soil moisture, temperature, texture, structure, or depth), provide model systems to examine the role of edaphic (soil-related) adaptation in ecological speciation (Rajakaruna, 2004; Kay et al, 2011) and adaptive radiation (Ellis & Weis, 2005; Paun et al., 2016; Shimizu-Inatsugi et al., 2016).
The data sets pertaining to herbaceous and shrubby vegetation and edaphic factors were subjected to three type of multivariate analysis i.e., TWINSPAN (Two-way Indicator Species Analysis), DCA (Detrended Correspondence Analysis) and CCA (Canonical Correspondence Analysis).