Book of Abstracts (PDF) - International Mycological Association

IMC7 Main Congress Theme I: BIODIVERSITY AND CONSERVATION Posters
538 - Wood-inhabiting fungi in primary and secondary
seasonally dry tropical forest, Costa Rica
I. Lindblad
University of Oslo, Kringkollen 13, 0690 Oslo, Norway. -
E-mail: irene.lindblad@bio.uio.no
The relation between management regime, quality of
coarse woody debris, and presence of some groups of
wood-inhabiting fungi was explored in a tropical dry forest.
A patch of primary forest and a nearby old secondary forest
were surveyed in Santa Rosa National Park, Guanacaste,
Costa Rica. A total of 81 species of poroid and stereoid
fungi were found. The primary forest had 62 species, while
54 species were recorded in the secondary forest. Thirtyfive
species were common between the stands. More
species were exclusively found in the primary forest than in
the secondary one (27 vs. 20). The curve for cumulative
number of species on increasing number of logs was
slightly steeper for the primary forest than for the
secondary. At least 84 logs had to be examined before a
significant difference in species richness between the two
forests could be detected. The results indicate that species
richness of poroid and stereoid fungi is returning to the
level of the primary forest in a regenerating dry forest
habitat when the woody debris is allowed to stay in the
forest and there is a patch of original forest in the vicinity.
Relations between substrate quality and the occurrence of
fungi in the different forest types were explored and
reasons for the observed patterns are discussed.
539 - Growth of mycorrhizal Leucaena leucocephala
(Lam.) de Wit seedlings in copper contaminated soils
C.E.L. Lins 1 , G.A. Silva 1* , U.M.T. Cavalcante 2 , A.S.
Messias 3 , E.V.S.B. Sampaio 4 & L.C. Maia 1
1 Departamento de Micologia - Universidade Federal de
Pernambuco, 50670-420 Recife -PE, Brazil. -
2 Departamento de Biologia - Universidade Federal Rural
de Pernambuco, 52171-030 Recife - PE, Brazil. -
3 Departamento de Química - Universidade Católica de
Pernambuco, 50050-900 Recife - PE, Brazil. - 4 Depto. de
Energia Nuclear/CTG/Universidade Federal de
Pernambuco, 50670-420, Brazil. - E-mail:
gladstonesilva@yahoo.com
The ability of the mycorrhizal symbiosis in favouring
nutrient absoption in agricultural systems, specially in arid
and semiarid areas, as well as the toxicity of heavy metals
has been well documented. Due to the low infectivy
potential of the AMF at the study area (Mineradora
Caraíbas, Bahia State, Brazil), we evaluated the effect of
the mycorrhizal association in seedlings of Leucaena
leucocephala in soils with increasing proportions of copper
contamination. Soils from an 'caatinga' area, not impacted
(control) and impacted by copper mining (site that receives
the waste product) were used. Seedlings were inoculated
with Glomus etunicatum Becker & Gerd. and cultivated in
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substrate constituted by soil from the impacted area diluted
in soil from the control area, in the following proportions:
0, 25, 50, 75, and 100%. In general, increasing the
proportion of copper contaminated soil had a negative
effect on plant growth. Mycorrhizal plants presented higher
height, foliar number, and shoot and root biomass than
those non inoculated, when maintained in soil with up to
50% contamination. The highest number of AMF spores
(3.2 g -1 soil) was found in substrate with 25%
contamination. The arbuscular colonization was higher
than 40% in the treatments with up to 50% of copper
contamination. The plant-fungi association promoted
higher copper tolerance of the seedlings, but the
mycorrhizal benefit was lost when soil contamination was
higher than 50%. Financial support: CAPES and CNPq.
540 - A survey of macrofungi at Pakua mountain range
in central Taiwan
P.L. Lu
Book of Abstracts
Botany Department, National Chung-Hsing University,
Taichung, Taiwan. - E-mail: lufreda@yahoo.com.tw
The fungal flora, with special focus on macrofungi of
Pakua mountain range in the vicinity of Chang-Hua city
(24 degree 10' N, 120 degree 50' E) was surveyed. The
elevation is between 20-80 m, the average temperature
ranges from 18-27 degrees centigrade and the annual
precipitation is about 1732 mm. Mostly specimens'
collection was made primarily during rainy days from
August 2001 to April 2002. Seventy specimens were
collected and identified. Among the identified collection 60
specimens belong to basidiomycetes and 4 in ascomycetes.
Tricholomataceae, Pluteaceae, Cortinariaceae, and
Amanitaceae are among the dominant families in the flora.
An estimated 24,000 fungal species inhabit in Taiwan, an
island located at the northern end of pacific archipelago.
However, only one-sixth of them have been reported. With
the increasing pressure of economic development poses an
urgent need for the investigation of the island's fungal
resources. Pakua mountain range is among a unique spot
that has never been systematically investigated.
541 - Fungi (Basidiomycetes) in the Kielce town
(Central Poland)
J. Luszczyñski
Institute of Biology, Swietokrzyska Academy, Swietokrzyska
St. 15, PL-25-406 Kielce, Poland. - E-mail:
jluszcz@pu.kielce.pl
The Kielce town (112 km 2 , population over 220 000
inhabitants) has a dense ca 25% forest cover. Comparing to
the other Polish or European towns, it is characterized by
the presence of highly differentiated natural vegetation and
variety of habitats. Macromycetes were mapped using
carthogram method. The area of town was divided into the