@Article{AlmeidaSSCAGRSVSAMLLLBSPLSB:2019:PeEfFr,
author = "Almeida, Danilo R. A. and Stark, Scott C. and Schietti, Juliana
and Camargo, Jos{\'e} L. C. and Amazonas, Nino T. and Gorgens,
Eric B. and Rosa, Diogo M. and Smith, Marielle N. and Valbuena,
Ruben and Saleska, Scott and Andrade, Ana and Mesquita, Rita and
Laurance, Susan G. and Laurance, William F. and Lovejoy, Thomas E.
and Broadbent, Eben N. and Shimabukuro, Yosio Edemir and Parker,
Geoffreey G. and Lefsky, Michael and Silva, Carlos A. and
Brancalion, Pedro H. S.",
affiliation = "{Universidade de S{\~a}o Paulo (USP)} and {Michigan State
University} and {Instituto Nacional de Pesquisas da Amazonia
(INPA)} and {Instituto Nacional de Pesquisas da Amazonia (INPA)}
and {Universidade de S{\~a}o Paulo (USP)} and {Universidade
Federal do Vale do Jequitinhonha e Mucuri (UFVJM)} and {Instituto
Nacional de Pesquisas da Amazonia (INPA)} and {Michigan State
University} and {University of Cambridge} and {University of
Arizona} and {Instituto Nacional de Pesquisas da Amazonia (INPA)}
and {Instituto Nacional de Pesquisas da Amazonia (INPA)} and
{James Cook University} and {University of Arizona} and {Instituto
Nacional de Pesquisas da Amazonia (INPA)} and {University of
FloridA} and {Instituto Nacional de Pesquisas Espaciais (INPE)}
and {Smithsonian Environmental Research Center} and {Colorado
State University} and {NASA Goddard Space Flight Center} and
{Instituto Nacional de Pesquisas da Amazonia (INPA)}",
title = "Persistent effects of fragmentation on tropical rainforest canopy
structure after 20 yr of isolation",
journal = "Ecological Applications",
year = "2019",
volume = "29",
number = "6",
pages = "e01952",
month = "Sept.",
keywords = "airborne laser scanner, Amazon, biological dynamics of forest
fragments project, edge effects, forest degradation, forest
dynamics, forest succession, land use change, leaf area density,
lidar, vegetation structure.",
abstract = "Assessing the persistent impacts of fragmentation on aboveground
structure of tropical forests is essential to understanding the
consequences of land use change for carbon storage and other
ecosystem functions. We investigated the influence of edge
distance and fragment size on canopy structure, aboveground woody
biomass (AGB), and AGB turnover in the Biological Dynamics of
Forest Fragments Project (BDFFP) in central Amazon, Brazil, after
22+ yr of fragment isolation, by combining canopy variables
collected with portable canopy profiling lidar and airborne laser
scanning surveys with long-term forest inventories. Forest height
decreased by 30% at edges of large fragments (>10 ha) and
interiors of small fragments (<3 ha). In larger fragments, canopy
height was reduced up to 40 m from edges. Leaf area density
profiles differed near edges: the density of understory vegetation
was higher and midstory vegetation lower, consistent with canopy
reorganization via increased regeneration of pioneers following
post-fragmentation mortality of large trees. However, canopy
openness and leaf area index remained similar to control plots
throughout fragments, while canopy spatial heterogeneity was
generally lower at edges. AGB stocks and fluxes were positively
related to canopy height and negatively related to spatial
heterogeneity. Other forest structure variables typically used to
assess the ecological impacts of fragmentation (basal area,
density of individuals, and density of pioneer trees) were also
related to lidar-derived canopy surface variables. Canopy
reorganization through the replacement of edge-sensitive species
by disturbance-tolerant ones may have mitigated the biomass loss
effects due to fragmentation observed in the earlier years of
BDFFP. Lidar technology offered novel insights and observational
scales for analysis of the ecological impacts of fragmentation on
forest structure and function, specifically aboveground biomass
storage.",
doi = "10.1002/eap.1952",
url = "http://dx.doi.org/10.1002/eap.1952",
issn = "1051-0761",
language = "en",
targetfile = "almeida_persistent.pdf",
urlaccessdate = "19 abr. 2024"
}