Diversity and Structure of Natural Regeneration in Swamp Forests in Southeastern Brazil

Ávila, Marly Antonielle; Mota, Nayara Mesquita; Souza, Saimo Rebleth; Santos, Rubens Manoel dos; Nunes, Yule Roberta Ferreira

doi:10.1590/2179-8087-FLORAM-2019-0110

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ORIGINAL ARTICLE, Conservation of nature • Floresta Ambient. 28 (1) • 2021 • https://doi.org/10.1590/2179-8087-FLORAM-2019-0110 copy

Diversity and Structure of Natural Regeneration in Swamp Forests in Southeastern Brazil

Authorship SCIMAGO INSTITUTIONS RANKINGS

Abstract

Many factors can influence the structures and distributions of plant communities. Plant diversity of swamp forests reflect responses to water stress conditions. We evaluated the floristic diversity, structure, and composition of the regenerating shrub-tree species of six swamp forests in veredas ecosystems (northern Minas Gerais, Brazil), and the floristic similarities between them. All individuals ≥ 1 cm in diameter at ground level and < 3 cm in diameter at breast height were sampled in one hundred 25 m² plots in each area. A total of 5442 individuals were recorded, distributed among 134 species, 85 genera, and 47 botanical families, with a diversity (Shannon) of 3.38 and equability (Pielou) of 0.69. Beta diversity was high, while similarities between the areas were low, with only two species common to all six sites. The forests showed different compositions, diversities, and natural regeneration structures, reflecting their ecotone nature and past anthropic impacts.

Keywords:
Flooded Areas; Juveniles; Phytosociology; Succession; Vereda

Area	Location	Total area	Water flow	Tree density	Average height of trees	Artificial drainage channel	Natural channel	Fire	Cattle	Zones
AD	15°20'03.1" S	96	Stable	Dense	25	Absence	Perennial	Absence	Present	Three
AD	44°51'00.0" W	96	Stable	Dense	25	Absence	Perennial	Absence	Present	Three
AL	15°21'37.2" S	154	Stable	Dense	30	Present	Perennial	Absence	Present	Three
AL	44°54'45.9" W	154	Stable	Dense	30	Present	Perennial	Absence	Present	Three
SF	15°23'4.4" S	28	Stable	Dense	25	Absence	Perennial	Absence	Absence	Two
SF	44°50'59.6" W	28	Stable	Dense	25	Absence	Perennial	Absence	Absence	Two
BG	15°26'26.6" S	350	Irregular	Irregular sparse trees	8	Present	Intermittent	Present	Present	Three
BG	45°3'55" W	350	Irregular	Irregular sparse trees	8	Present	Intermittent	Present	Present	Three
CP	15°16'10.23" S	82	Absent	Irregular sparse trees	15	Present	Intermittent	Present	Present	Three
CP	44°51'13.6" W	82	Absent	Irregular sparse trees	15	Present	Intermittent	Present	Present	Three
PI	15°22'30.2" S	2,215	Irregular	Irregular sparse trees	15	Present	Intermittent	Present	Present	Three
PI	45°2'0,17" W	2,215	Irregular	Irregular sparse trees	15	Present	Intermittent	Present	Present	Three

Site	Total area (ha)*	NI	S	H'	J'	AB
AD	96	1404	46	1.82^e	0.48	66.89
AL	154	1210	44	2.28^c	0.60	58.43
BG	350	860	29	2.23^cd	0.66	38.01
CP	82	724	30	2.07^d	0.61	43.04
PI	2215	619	44	2.93^b	0.77	33.91
SF	28	625	59	3.18^a	0.77	34.98

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
Yule Roberta Ferreira Nunes Universidade Estadual de Montes Claros (UNIMONTES), Av. Prof. Rui Braga, s/n, 39401-089, Montes Claros, MG, Brasil e-mail: yule.rfnunes@gmail.com