Edge Effect on the Litter Production of a Semi-Deciduous Seasonal Forest Fragment

Barreto-Garcia, Patrícia Anjos Bittencourt; Oliveira, Monalisa Fagundes; Oliveira, Francisco Garcia R. B.; Lacerda, Laís Ribeiro Lima

doi:10.1590/2179-8087.103217

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Original Article, Conservation of Nature • Floresta Ambient. 26 (4) • 2019 • https://doi.org/10.1590/2179-8087.103217 copy

Edge Effect on the Litter Production of a Semi-Deciduous Seasonal Forest Fragment

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The edge effect makes forest communities more susceptible to changes and may cause changes in different ecosystem characteristics such as litter production. The objective of this work was to evaluate the edge effect on the contribution of litter and its temporal variation in a Semi-Deciduous Seasonal Forest fragment located in Vitória da Conquista, BA, Brazil. Four sampling ranges were delimited in the forest fragment: edge (0-10 m from the edge), transition 1 (40-50 m from the edge), transition 2 (80-90 m from the edge) and interior (400-410 m from the edge). The produced litter was collected monthly. The main litter components were leaves and branches in all sampling ranges. The contribution of the other fractions obeyed different orders at the edges (bark > reproductive structures) and interior (reproductive structures > bark). The edge effect did not influence the contribution of total litter and its temporal variation, only manifesting in the production of reproductive structures.

Keywords:
leafing; deposition; forest fragmentation

Area (ha)		Elevation (m)	ISO (m)	PROX (m)
Total	Nuclear
45.0	32.0	915	661.5	2.87

Strip	pH	P	K⁺	Ca²⁺	Mg²⁺	H⁺⁺Al³⁺	BS	CEC	SOM
		mg dm⁻³	---------- cmolc dm⁻³ ----------						g dm⁻³
Edge	5.6	2.7	0.16	2.2	1.0	3.3	3.4	6.7	36.7
Transition 1	5.1	1.0	0.13	3.0	1.2	4.1	4.3	8.5	54.3
Transition 2	5.0	1.0	0.11	3.1	1.1	4.0	4.3	8.4	51.3
Interior	4.6	2.3	0.15	2.5	1.2	6.2	3.9	10.1	54.7

	Climatic variables
Month/year	T mean	RH	Ppt	Wind
	°C	%	mm	m/s
12/2011	23.2	84.6	132.8	4.4
01/2012	22.8	78.3	17.30	4.5
02/2012	22.5	74.7	29.30	2.1
03/2012	23.7	70.7	12.20	2.0
04/2012	23.6	68.6	1.7	2.2
05/2012	20.3	81.5	30.2	2.0
06/2012	20.6	79.1	22.20	1.9
07/2012	19.2	78.8	18.00	2.2
08/2012	18.4	79.6	55.30	3.0
09/2012	20.9	78.2	6.70	2.6
10/2012	22.0	77.5	48.40	4.6
11/2012	22.2	90.00	358.4	1.4

Strip	Leaves	Branches	Bark	RS	Total litter
Strip	kg ha⁻¹ month⁻¹				kg ha⁻¹ month⁻¹	kg ha⁻¹ year⁻¹
Edge	273.85 a	56.11 a	4.49 a	0.89 c	335.33 a	4.024.00 a
Transition 1	234.63 a	57.33 a	3.45 a	2.77 b	298.18 a	3.578.16 a
Transition 2	275.43 a	82.06 a	3.55 a	5.69 a	366.73 a	4.400.80 a
Interior	338.21 a	77.63 a	1.85 a	5.76 a	423.44 a	5.081.28 a

Litter	Climatic variables
Litter	Temp	RH	Ppt	Wind
	Edge
Leaves	−0.01^ns	−0.48^ns	−0.59*	−0.45^ns
Branches	0.78*	−0.10^ns	−0.07^ns	−0.09^ns
Bark	−0.46^ns	0.15^ns	0.01^ns	−0.07^ns
RS	0.15^ns	0.34^ns	0.23^ns	0.12^ns
Total	0.08^ns	−0.36^ns	−0.55*	−0.43^ns
	Transition 1
Leaves	−0.02^ns	−0.57*	−0.18^ns	−0.43^ns	0.00^ns
Branches	0.11^ns	0.32^ns	0.43^ns	−0.19^ns
Bark	0.06^ns	−0.26^ns	−0.27^ns	−0.27^ns
RS	−0.28^ns	0.18^ns	0.04^ns	−0.00^ns
Total	0.03^ns	−0.11^ns	0.22^ns	−0.41^ns
	Transition 2
Leaves	−0.38^ns	0.09^ns	0.17^ns	−0.12^ns
Branches	−0.34^ns	0.78*	0.46^ns	0.02^ns
Bark	−0.30^ns	0.48^ns	0.12^ns	−0.15^ns
RS	0.462^ns	0.12^ns	0.25^ns	0.42^ns
Total	−0.31^ns	0.50^ns	0.50^ns	0.18^ns
	Interior
Leaves	−0.20^ns	0.03^ns	0.01^ns	−0.42^ns
Branches	0.36^ns	−0.15^ns	0.25^ns	0.30^ns
Bark	−0.17^ns	−0.02^ns	−0.11^ns	0.34^ns
RS	0.19^ns	0.33^ns	0.13^ns	0.36^ns
Total	0.01ns	−0.14ns	−0.08ns	−0.30ns

Instituto de Florestas da Universidade Federal Rural do Rio de Janeiro Rodovia BR 465 Km 7, CEP 23897-000, Tel.: (21) 2682 0558 | (21) 3787-4033 - Seropédica - RJ - Brazil
E-mail: floram@ufrrj.br

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[1] CORRESPONDENCE TO Patrícia Barreto-Garcia Universidade do Sudoeste da Bahia (UESB) Estrada do Bem Querer, km 4, CEP 45031-300 Vitória da Conquista, BA, Brasil e-mail: patriciabarreto@uesb.edu.br