10.5061/DRYAD.6CK1816
Martínez-Blancas, Alejandra
National Autonomous University of Mexico
Paz, Horacio
National Autonomous University of Mexico
Salazar, Gerardo A.
National Autonomous University of Mexico
Martorell, Carlos
National Autonomous University of Mexico
Data from: Related plant species respond similarly to chronic
anthropogenic disturbance: implications for conservation decision-making
Dryad
dataset
2019
Stenocereus stellatus
Plocosperma buxifolium
Zornia reticulata
Lantana camara
Heterosperma pinnatum
Conyza filaginoides
disturbance-response analysis
Bouteloua scorpioides
Bursera aptera
Stenocereus pruinosus
Porophylum linaria
Tripogon spicatus
Karwinskia humboldtiana
Tripogandra purpurascens
Dalea sericea
Opuntia velutina
Buchnera pusilla
Florestina purpurea
Dichromanthus michuacanus
Cnidoscolus tubulosus
Sedum oteroi
Arenaria lanuginosa
Muhlenbergia rigida
Mimosa sp
Randia thurberi
Cyperus squarrosus
semiarid grassland
Portulaca pilosa
Croton sp
Myrtillocactus geometrizans
Digitaria bicornis
Tridax coronopifolia
Juliania adstringens
Polianthes bicolor
Richardia tricocca
Echeandia flavescens
Mammillaria hernandezii
Pachycereus marginatus
Helianthemum glomeratum
Cyperus seslerioides
Loeselia caerulea
Aristida adscensionis
Oxalis lunulata
Pachycereus weberi
Bursera submoniliformis
Capparis incana
Bouteloua hirsuta
Heliotropium foliosissimum
Opuntia pilifera
Valeriana laciniosa
Bouteloua polymorpha
Sanvitalia procumbens
Microchloa kunthii
Cercidium praecox
Ceiba parvifolia
Ipomoea plummerae
Bouteloua chondrosioides
Cordia cylindrostachya
Bursera fagaroides
Byrsonima crassifolia
Castela erecta
Lycurus phalaroides
Neobuxbaumia tetetzo
surrogate taxa
Plantago nivea
Sporobolus tenuissimus
Acacia sp
Bursera aloexylon
Bulbostylis tenuifolia
Gomphrena serrata
Gyrocarpus mocinoi
Aristida divaricata
Dichondra argentea
Coryphantha pseudoradians
Dyssodia papposa
Doyerea emetocathartica
Cyrtocarpa procera
Stevia ephemera
Schizachyrium sanguineum
Agave macroacantha
Polygala compacta
Nothoscordum bivalve
Acacia cochliacantha
Mammillaria carnea
Agave potatorum
Schkuhria pinnata
Porophyllum linaria
Crusea diversifolia
Prosopis laevigata
Lippia graveolens
Aristida schiedeana
Stenandrium dulce
Bursera schlechtendalii
Ferocactus latispinus
Coryphantha calipensis
Fouquieria formosa
Ophioglossum engelmannii
Bursera morelensis
Phemeranthus oligospermus
Ipomoea capillacea
Opuntia decumbens
Tagetes micrantha
Muhlenbergia implicata
Muhlenbergia peruviana
Euphorbia tithymaloides
Bouteloua repens
Salvia axillaris
Euphorbia schlechtendalii
Pseudosmodingium multifolium
Thymophylla auranthiaca
Tropical dry forest
Pilosocereus chrysacanthus
2019-03-07T00:00:00Z
2019-03-07T00:00:00Z
en
https://doi.org/10.1111/1365-2664.13151
12542 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
1. Many developing countries harbor inordinate numbers of species that
face little-understood, gradual changes in their environment, such as
chronic anthropogenic disturbance (CAD, a high frequency but low intensity
form of disturbance). These countries also lack the resources to study
each species, so conservation practices have had to be generalized
assuming that complete taxonomic groups (e.g., cacti or cetaceans) may be
managed in the same way. This could be justified if closely related
species respond similarly to threatening factors. We assessed if relatives
respond similarly to CAD and whether this affects phylogenetic diversity.
To determine if such patterns occur in different systems, we studied a
semiarid grassland and tropical dry forest in Mexico. 2. Species’ identity
and abundance was recorded in 59 sites differing in CAD intensity.
Disturbance response indices were calculated for each species. Nested
ANOVAs coupled with null models were applied to determine if
generalizations within taxa are justified and which taxonomic level (using
APG IV system) explained the most variation in disturbance response among
species. We obtained phylogenetic trees using molecular data for the
grassland and published phylogenies for the tropical forest. Phylogenetic
signal was measured with Pagel’s λ, whereas community mean phylogenetic
distance was regressed on CAD. 3. Higher taxonomic levels explained more
variation among species than expected by chance, indicating that related
species respond similarly to CAD. However, only species in the same genus
behaved similarly enough (explaining over 80 % of the accumulated
variance) to make generalizations reliable. This is the result of an
underlying, if modest, phylogenetic signal in CAD responses. 4. Mean
phylogenetic distance decreased with CAD in the grassland but not the
tropical dry forest. This suggests that CAD was a stronger environmental
filter in the grassland but weak in the tropical dry forest, where it was
less intense. Policy implications. Species inform us about how their
relatives respond to CAD, supporting the idea that generalizations in
management are possible; however, this procedure is seemingly reliable
only within genera, and not within orders or families. CAD may reduce
phylogenetic diversity, perhaps leading to ecosystem function
loss.27-Feb-2018
Abundance and chronic anthropogenic disturbance at two vegetation
typesData for species abundance and chronic anthropogenic disturbance
(CAD) in a semiarid grassland and a tropical dry forest. The file contains
two sections, one for each vegetation type. All data correspond to
abundances, except column labeled CAD. Semiarid grassland The semiarid
grassland is in Concepción Buenavista, Oaxaca, southern Mexico, at an
elevation of 2275 m a.s.l. Annual precipitation is 530·3 mm, and mean
temperature is 16·3 °C. Data come from 21 0·5 ha sites. In each site,
eight 1 × 1 m quadrats were randomly chosen, and in each one we randomly
selected 20 0·1 × 0·1 m squares. In the latter, we quantified the
abundance of all vascular plants. Tropical dry forest The tropical dry
forest is located in La Cañada, Oaxaca. Its elevation ranges from 580 m
a.s.l. to 850 m a.s.l. Precipitation ranges from 473 to 515 mm in annual
precipitation and mean temperature ranges from 25·2 to 26·2 °C.Data
comprise vascular plant abundances for 38 sites with 3 transects each,
measuring 50 × 10 m for trees and 50 × 4 m for shrubs and small
succulents. Chronic anthropogenic disturbance The chronic anthropogenic
disturbance (CAD) index is based on 14 metrics that measure disturbance
values for human activities, livestock, and land degradation, the sum of
which provides an estimate of total CAD. The index runs from zero in
pristine sites to slightly over 100 in extremely degraded communities
where even soil has been almost completely lost. Metrics for human
activities comprise fuelwood extraction, human trails density, human trail
surface, settlement proximity, contiguity to activity cores, land use and
wildfires. Metrics for livestock raising comprise goat droppings, cattle
droppings, browsing, livestock trail density and soil compaction. Finally,
land degradations metrics comprise erosion, presence of soil islands and
totally modified surfaces. Each metric was measured in 3 different
transects and averaged to obtain a single value for each site. See
Martorell and Peters (2005, 2008) for more
details.MartorellMartinezAbundanceCAD.csv
La Cañada
Oaxaca
Puebla
Mexico
Mixteca Alta