P. J. F. P. Rodrigues et al. / Open Journal of Ecology 1 (2011) 63-64
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64
Tab le 1. Summary of structural parameters of a Tabebuia cassinoides DC. (Bignoniaceae) cohort established in 1997 at Picinguaba,
São Paulo, Brazil during a severe drought.
yr/period 1997 1999 2000 2001 2002 2003 2006
Total N 48 44 40 37 35 26 22
Deaths (%) 8.33 9.09 7.5 5.41 25.7 15.4
Diametera (mm2) 19 ± 7 19 ± 8 21 ± 8 22 ± 6.7 25 ±7
RDGRb (CV%) 100 85 106 220
Heighta (cm) 137 ± 60 141 ± 64 141 ± 68 165 ± 66 188 ± 73
Diameter vs. Heightc 0.89 0.88 0.66 0.85 0.81
Skewnessd 0.54 0.35 0.39 0.36 0.27
Kurtosisd 0.23 –0.28 –0.57 –0.77 –0.6
amean ± SD; brelative diameter growth rate—cm·cm–1·year–1 [14]; c r2, p < 0.005; dsize str u cture based on basal girth.
cial to survival in the subsequent deep flooding, as sug-
gested for Carapa guianensis Aubl. in Amazonian var-
zea forests [12]. In some restored wetlands, low water
levels favored the establishment of T. cassinoides [13].
Other local swamp tree species, such as the Clusiaceae
Symphonia globulifera L.f. and Calophylum brasiliense
Cambess., that also have seeds that float on the water,
differently from T. cassinoides, germinate forming pivo-
tal root structures that after fixation keep their shoots
static and erect. These root patterns may restrict the abi-
lity of these species to colonize permanently and deeply
flooded sites. Indeed, C. brasiliense occurs in Picingu-
aba wetlands, but mainly in shallow swamps (or periodi-
cally flooded sites). This pattern was previously observ-
ed at the National Reserve of Poç o das Antas [7].
Our observations suggest that the seedling coloniza-
tion pattern of Tabebuia cassinoides is dependent on sy-
nchronicity between annual seed production and an ap-
parently stochastic water-level fluctuation. Thus, survi-
val chances in the swamp may also be related to root
morphological patterns and to success in reaching a safe
site during a drought period .
ACKNOWLEDGEMENTS
We thank th e Ecology Department of the Federal Univ ersity of Rio de
Janeiro for logistical support, and Fábio R. Scarano, Andrea Costa and
Rodolfo C. Real de Abreu for sugg estions, and Janet R eid by the linguis -
tic advice.
REFERENCES
[1] Leck, M.A. (1989) Wetland seed banks. In: Leck, M.A.,
Parker, V.T. and Simpson R.L. Eds., Ecology of soil seed
banks, Academic Press, London, 283-305.
[2] Crawford, R.M.M. (1989) Studies in plant survival.
Blackwell Scientific Publications, Oxford, 296.
[3] Schupp, W.E. (1995) See d-seedling conf licts, habita t choice,
and patterns of plant recruitment. American Journal of
Botany, 82, 399-409. doi:10.2307/2445586
[4] Borges, K.H., Viana, V.M. and Paulo, R.A. (2000) Pro-
dução de sementes e manejo da caixeta. Scientia Fore-
stalis, 57, 111-122.
[5] Harper, J.L. Willians, J.T. and Sagar, G.R. (1965) The be-
haviour of seeds in the soil: The heterogeneity of soil sur-
faces and its role in determining the establishment of
plants. Journal of Ecology, 53, 273-286.
doi:10.2307/2257975
[6] Scarano, F.R. (1998) A comparison of dispersal, germina-
tion and establishment of woody plants subjected to dis-
tinct flooding regimes in Brazilian flood-prone forests
and estuarine vegetation. In: Scarano, F.R., Franco, A.C.
Eds., Ecophysiological Strategies of Xerophytic and Am-
phibious Plants in the Neotropics, Série Oecologia Bra-
siliensis, 4, 176-193.
[7] Scarano, F.R., Ribeiro, K.T., Moraes, L.F.D. and Lima,
H.C. (1997) Plant establishment on flooded and un-
flooded patches of a freshwater swamp forest in south-
eastern Brazil. Journal of Tropical Ecology, 14, 793-803.
doi:10.1017/S0266467400011007
[8] Gentry, A.H. (1992) Bignoniaceae. Part II (Tribe Teco-
meae). Flora Neotropica Monograph, 25, 1-370.
[9] Petit, R.J. and Hampe, A. (2006) Some evolutionary con-
sequences of being a tree. Annual Review of Ecology and
Systematics, 37, 187-214.
[10] Liu, G., Zhou, J., Li, W. and Cheng, Y. (2005) The seed
bank in a subtropical freshwater marsh: Implications for
wetland restoration. Aquatic Botany, 81, 1-11.
doi:10.1016/j.aquabot.2004.07.001
[11] De Simone, O., Müller, E., Junk, W.J. and Schmidt, W.
(2002) Adaptations of central Amazon tree species to
prolonged flooding: Root morphology and leaf longevity.
Plant Biology, 4, 512-522. doi:10.1055/s-2002-34127
[12] Scarano, F.R., Pereira, T.S. and Rôças, G. (2003) Seed
germination during floatation and seedling growth of Ca-
rapa guianensis, a tree from flood-prone forests of the
Amazon. Plant Ecology, 168, 291-296.
doi:.10.1023/A:1024486715690
[13] Zamith, L.R. and Scarano, F.R. (2010) Restoration of a
coastal swamp forest in southeast Brazil. Wetlands Ecol-
ogy and Management, 18, 435-448.
doi:10.1007/s11273-010-9177-z
[14] Evans, G.C. (1972) The Quantitative Analysis of Plant
Growth. Blackwell, Oxford.