Message - 7th IAL Symposium

More documents

Recommendations

Info

3B-2-P Lichen: from genome to ecosystem in a changing world (3B-2-P12) Submission ID: IAL0213-00001 LICHEN COMMUNITIES ON TSUGA HETEROPHYLLA IN COLD RAINFORESTS: WHAT DRIVES COMPOSITION AND RICHNESS? Taurer S. 1 , Wagner V. 2 , Hauck M. 3 , Spribille T. 4 1 University of Graz, Institute of Plant Sciences Graz, Graz, Austria 2 College of Forestry and Conservation, University of Montana, Missoula, MT, United States 3 Abteilung Pflanzenoekologie und Oekosystemforschung, University of Goettingen, Goettingen, Germany 4 Division of Biological Sciences, University of Montana, Missoula, MT, United States Epiphytic lichen communities in southeast Alaska are known to be among the richest of any high latitude, conifer-dominated region in the world. However, little is known of the local gradients that cause some lichen communities to be especially rich and others poor, and what causes local spikes in richness of cyanolichens. Understanding species distribution and richness concentration patterns is important since lichens are used for air quality and forest health monitoring. Epiphytic crust lichens were studied on 114 branches of Tsuga heterophylla trees at 19 different localities in low elevation boreal rainforests in the vicinity of Juneau, Alaska. Branches of equal cut-point diameter and controlled for overall collective twig mass were taken from different heights above the ground and in different light exposure situations with replication, and substrate element chemistry was determined by spectrometric analysis. Species richness was significantly correlated with a nutrient gradient (N content and C/N ratio as well as Zn content). A principal components analysis of species composition against quantified environmental gradients revealed a gradient between cyanolichen-dominated branches and those dominated by chlorolichens. This gradient was likewise primarily explained by the C/N ratio as well as tree and branch age and significant gradients in the content of Zn and other metals and cations. The results reinforce the importance of nutrient regimes and forest age structure in determining composition but suggest that cation gradients (such as Ca, Mg) ascribed importance for local enrichment of cyanolichen communities in inland regions may not explain as much variability in cold coastal rainforests. (3B-2-P13) Submission ID: IAL0284-00001 MICROLICHEN COMMUNITY STRUCTURE AS A WAY TO COMPREHEND TROPICAL DRY FOREST REGENERATION Miranda-González R. 1 , Lücking R. 2 , Mora- Ardila F. 3 , Barcenas-Peña A. 1 , Herrera- Campos M. A. 1 1 Botany, Posgrado en Ciencias Biológicas Instituto de Biología, UNAM, Mexico City, Mexico 2 Botany, Field Museum, Chicago, United States 3 Botany, Centro de Investigaciones en Ecosistemas (CIEco), UNAM, Morelia, Mexico The tropical dry forest is the most extensive ecosystem in the neotropics, and at the same time, one of the most endangered ones in the world. As a result, some studies aim to understand its regenerating process. The objective of this project was to comprehend the importance that lichen communities have in the succession process. For this, we analyzed the microlichen species cover in 204 trees at 4 levels of disturbance, ranging from 6 years after agricultural use to pristine areas, all on the Mexican Pacific coast. We found more than 120 lichen species. The best represented families were Arthoniaceae, Pyrenulaceae, Roccellaceae and Graphidaceae. Our analysis suggest that the lichen cover and richness recovers faster than expected, been the 18 years old forest statistically equal to the pristine areas. Nonetheless, the lichen community structure was completely different. Using an ordination analysis (NMS) we were able to distinguish the mature forest from all the levels of disturbance. We also found some lichens that can be used as indicators species of disturbance or conserved areas, mainly in the genera Pyrenula and Arthonia, as well as several new species. Using multivariate methods we analyzed the preference of species groups to some microenvironmental factors such as relative light intensity, phorophyte specificity and pH. Lastly we discuss the application of our results in conservation issues. 176
The 7 th International Association for Lichenology Symposium 2012 (3B-2-P14) Submission ID: IAL0289-00001 STUDY OF ANTIOXIDANT AND ANTICANCEROUS ACTIVITY OF RAMALINA LACERA FOR BIOMEDICAL APPLICATION Ganesan A. 1 , Ponnusamy P. 1 1 Biotechnology, K.S.R. College of Technology, Tiruchengode, Tamil Nadu, India Highly reactive free radicals and oxygen species are present in biological systems from wide variety of sources. These free radicals may oxidize nucleic acids, proteins, lipids or DNA and can initiate degenerative disease may include chronic diseases like heart and cancer diseases. Antioxidant compounds such as phenolic acid, flavonoids and terpenoids in food samples play an important role as a health-protecting factor. Among the plant kingdom, lichens are very important in terms of production of bioactive compounds. They are symbiotic organism of both fungus and algae. It has the enormous biomedical applications leads to effective drug molecule preparation against particular target. Attempts were made to study the anticancerous and antioxidant activities using Ramalina lacera, a fruticose lichen. Sequential extraction of 7 g with 100 ml of five different solvents like chloroform, acetone, ethyl acetate, ethanol and water was carried out using a Soxhalet extractor for 12-15 cycles. The extractive value recorded was 18.2, 23.8, 10.2, 73.2 and 37.4 mg/g of dry lichen sample, respectively. Among the different solvent systems tested, ethyl acetate was found to be best in terms of rapid extraction of bioactive substances from lichens which were recorded as 73.2 mg/g of dry lichens. Further, extracts were subjected to DPPH antioxidant activity to measure the scavenging abilities against free radicals at different time intervals. The results revealed that ethyl acetate and ethanol extracts showed the inhibition of radical as 70.4% and 84%, respectively, whereas acetone did not show any activity against free radicals. Aqueous and chloroform extracts showed least inhibition activity of 15% and 1.74%, respectively. We conclude that bioactive antioxidant molecules mainly present in ethyl acetate and ethanol extracts. Both these extracts were subjected to study the efficacy against MCF-7 and Hela cancer cell lines. Ethanol extracts showed the better IC 50 than ethyl acetate extract and it was found to be 40µM against Hela cell lines whereas MCF-7 cell line was 30µM. (3B-2-P15) Submission ID: IAL0309-00002 FUNCTIONAL AND STRUCTURAL ROLE OF LICHEN BIOTA Martin L. 1 , Martin J. L. 1 1 Environmental Protection, Euroacademy, Tallinn, Estonia It is well known that the ecological (systemic) role of lichen biota in communities is determined by the symbiotic character of lichens. In ecological communities, lichens perform as one of the first visible components of highly complex ecosystems. At least three important processes are initiated by lichens: accumulation of organic material as a result of photosynthesis on initially life-free surfaces, chemical (biochemical, biogeochemical) transformation of substrate matter, and accumulation and transformation of matter deposited from atmosphere (both dry and wet). Four main peculiarities comprise the following: symbiotic photosynthesis, remarkable selfsurface of lichen thalli, passive and active accumulation of water and minerals through atmospheric moisture, active penetration of hyphae into substrate surface and bounding of airborne dust particles by hyphae. Substrate conditions change under the natural weathering (rock surfaces) or ageing (tree bark) processes or under the human impact (environment pollution s.l.). A specific group of substrates are man-made materials. In this case, some processes initiated by natural agents are the same as in natural substrates. Very often, man-made substrates change in different ways, mainly through oxidation, alkalization, or some other chemical or physical destructive processes. Lichens as complex organisms (systems) perform several biospheric functions of living mater, such as a gas function, two types of concentration functions, an oxidation-reduction function, an acidification-alkalization function, and a biochemical function. 177 3B-2-P
Page 1 and 2:
The 7 th IAL Symposium 2012 Lichens
Page 3 and 4:
The 7 th International Association
Page 5 and 6:
Welcome Message The 7 th Internatio
Page 7 and 8:
Welcome Message Dear IAL7 Participa
Page 9 and 10:
Report The 7 th International Assoc
Page 11 and 12:
Opening Address The 7 th Internatio
Page 13 and 14:
IAL COUNCIL (2008-2012): The 7 th I
Page 15 and 16:
Page 17 and 18:
SYMPOSIUM VENUE The 7 th Internatio
Page 19 and 20:
FLOOR PLAN The 7 th International A
Page 21 and 22:
Page 23 and 24:
Page 25 and 26:
Page 27 and 28:
Page 29 and 30:
Page 31 and 32:
Page 33 and 34:
Page 35 and 36:
Scientific Program P14
Page 37 and 38:
s s The 7 th International Associat
Page 39 and 40:
Page 41 and 42:
s s s s s s The 7 th International
Page 43 and 44:
s s The 7 th International Associat
Page 45 and 46:
s s s s s The 7 th International As
Page 47 and 48:
s s s The 7 th International Associ
Page 49 and 50:
s s s s The 7 th International Asso
Page 51 and 52:
Page 53 and 54:
Page 55 and 56:
Page 57 and 58:
Page 59 and 60:
Page 61 and 62:
s s s s s s s The 7 th Internationa
Page 63 and 64:
Page 65 and 66:
Page 67:
ABSTRACTS OF CONTRIBUTED PAPERS (OR
Page 70 and 71:
1 2 3
Page 72 and 73:
Lichen: from genome to ecosystem in
Page 74 and 75:
Page 76 and 77:
Page 78 and 79:
Page 80 and 81:
1A-O Lichen: from genome to ecosyst
Page 82 and 83:
Page 84 and 85:
Page 86 and 87:
Page 88 and 89:
Page 90 and 91:
1B-O Lichen: from genome to ecosyst
Page 92 and 93:
Page 94 and 95:
Page 96 and 97:
Page 98 and 99:
2A-1-O Lichen: from genome to ecosy
Page 100 and 101:
Page 102 and 103:
Page 104 and 105:
Page 106 and 107:
Page 108 and 109:
Page 110 and 111:
Page 112 and 113:
Page 114 and 115:
Page 116 and 117:
Page 118 and 119:
Page 120 and 121:
Page 122 and 123:
Page 124 and 125:
3B-1-O Lichen: from genome to ecosy
Page 126 and 127:
Page 128 and 129:
Page 130 and 131:
Page 132 and 133:
Page 134 and 135:
Page 136 and 137:
Page 138 and 139:
Page 140 and 141:
Page 142 and 143:
Page 144 and 145:
Page 146 and 147:
Page 148 and 149:
Page 150 and 151:
Page 152 and 153:
Page 154 and 155:
Page 156 and 157:
Page 158 and 159:
Page 160 and 161:
Page 162 and 163:
Page 164 and 165:
Page 166 and 167:
Page 168 and 169:
Page 170 and 171:
2A-1-P Lichen: from genome to ecosy
Page 172 and 173:
Page 174 and 175:
Page 176 and 177:
Page 178 and 179:
Page 180 and 181:
Page 182 and 183:
Page 184 and 185:
Page 186 and 187:
Page 188 and 189:
Page 190 and 191:
Page 192 and 193:
Page 194 and 195:
Page 196 and 197: Lichen: from genome to ecosystem in
Page 236 and 237: 3B-1-P Lichen: from genome to ecosy
Page 276: 1 2 3
show all

Message - 7th IAL Symposium

You also want an ePaper? Increase the reach of your titles

Delete template?

Save as template?