Landscape and Biodiversity Assessment of the Allah Valley Watershed Forest Reserve Lake Sebu, South Cotabato
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Technical Consultants Mr. Reymar R. Castillo Forest Ecosystem Specialist Technical Staff Allan R. Artajo Ozzy Boy S. Nicopior Jerosa U. Abin Mark Jayson T. Dalangay Aldrin C. Sagucio Mark James P. Aleta Renalyn R. Castillo-Estenor Lydio P. Aguihap Landscape and Biodiversity Assessment of the Allah Valley Watershed Forest Reserve Lake Sebu, South Cotabato A Baseline Study on Pilot Area National Pilots on the Prevention, Control and Management of Priority Forest IAS (Philippines) July 2013 Technical Consultant REYMAR R. CASTILLO Terrestrial Biodiversity Specialist DANILO M. TANDANG Plant Taxonomist and ALLAN R. ARTAJO RENALYN R.CASTILLO-ESTENOR JENNIFER D. EDRIAL MARK JAYSON T. DALANGAY JEROSA U. ABIN Research Assistants ALDRIN C. SAGUCIO MARK JAMES P. ALETA LYDIO P. AGUIJAP Field Assistants Cover Designed and Layout: Renalyn C.Estenor. At the report cover are some photos of flowering and non flowering plants documented during field survey and data gathering. Also includes the view of the Landscape of the Lake Sebu taken from the Lamlahak Subwatershed. The flowering plants (angiosperms), also known as Angiospermae or Magnoliophyta, are the most diverse group of land plants. Flowering plants provide economic resources in the form of wood, paper, fiber, medicines, decorative and landscaping plants, and many other uses. The non flowering plants Photo Credit: Mr. Danilo M. Tandang i TABLE OF CONTENTS Title Page Acknowledgement i Table of Contents ii List of Tables iii List of Figures v List of Appendices vi EXECUTIVE SUMMARY vii SECTION 1. INTRODUCTION 1 1.1 Rationale 1 1.2 The Project 5 1.3 Objectives 6 1.4 Methodology 7 SECTION 2. PHYSICAL ENVIRONMENT 10 2.0 Methodology 10 2.1 Geographical Location and Land Area 10 2.2 Topography, Slope, Elevation and Aspect 13 2.3 Climate 18 2.4 Hydrology 22 2.5 Soils 25 2.6 Geology 28 2.7 Land Classification, Cover and Use 30 2.8 Geologic Hazards 33 SECTION 3. BIOLOGICAL ENVIRONMENT 38 3.1 Methodology 38 3.2 Biological Characteristics 61 3.3 Vegetation and Flora Resources of the Lamlahak Subwatershed 71 3.4 Fauna Resources of Lamlahak Subwatershed 92 3.5 Arthropod Composition and Diversity 105 3.6. Land Use and Landscape Analysis 111 Section 4. MANAGEMENT/ACTION PLAN 112 Integrated Prevention and Control Management of IAS 112 Section 5. CONCLUSIONS 114 Section 6. REFERENCES 116 APPENDICES PHOTO DOCUMENTATION ii LIST OF TABLES Table Title Page 1 Area by Elevation Class of Lamlahak Subwatershed, Lake Sebu, South Cotabato 13 2 Slope Category of Lamlahak Subwatershed, Lake Sebu, South Cotabato 16 3 Slope Aspect of the Lamlahak Subwatershed, Lake Sebu, South Cotabato 18 4 Land Capability of Lake Sebu, South Cotabato 30 5 List of Identified Sampling Sites, Lamlahak Subwatershed, Lake Sebu, South Cotabato 39 6 Biodiversity scale as used by Fernando (1998) 59 7 The Southwest Mindanao Region Wildlife Species 66 8 Overall Dominant Families, Lamlahak Subwatershed, Lake Sebu, South Cotabato 71 9 Distribution of Genera, Lamlahak Subwatershed, Lake Sebu, South Cotabato 72 Overall Importance Value of Plant Species, Lamlahak Subwatershed, Lake Sebu, South 10 73 Cotabato Dominant Plant Families in the 24 Plots, Lamlahak Subwatershed, Lake Sebu, South 11 74 Cotabato SIV of plant in the 24 plots within invaded area, Lamlahak Subwatershed, Lake Sebu, South 12 75 Cotabato The summary of species, family and generic representation in the different plots within the 13 76 study area. in Lamlahak, Lake Sebu, South Cotabato Growth Form Composition in the Stratified Plot Sampling, Lamlahak Subwatershed, Lake 14 76 Sebu, South Cotabato 15 Plant families in Site 6, Lamlahak Subwatershed, Lake Sebu, South Cotabato 77 16 SIV of Plants in Site 6, Lamlahak Subwatershed, Lake Sebu, South Cotabato 78 17 Dominant Families in Site 5, Lamlahak Subwatershed, Lake Sebu, South Cotabato 79 18 SIV of Plants in Site 5, Lamlahak Subwatershed, Lake Sebu, South Cotabato 79 19 Overall Floral Diversity, Lamlahak Subwatershed, Lake Sebu, South Cotabato 81 Diversity of 24 plots within the invaded area, Lamlahak Subwatershed, Lake Sebu, South 20 82 Cotabato Diversity of Flora in 1x1m, 5x5m and 10x10m plots within the invaded area Lamlahak 21 83 Subwatershed, Lake Sebu, South Cotabato 22 Species Diversity in 1x1m Plots, Lamlahak Subwatershed, Lake Sebu, South Cotabato 83 23 Overall Diversity in 1x1m Plots, Lamlahak Subwatershed, Lake Sebu, South Cotabato 84 24 Species Diversity in 5x5m Plots, Lamlahak Subwatershed, Lake Sebu, South Cotabato 85 25 Overall Diversity for 5x5m Plots, Lamlahak Subwatershed, Lake Sebu, South Cotabato 86 26 Species Diversity in 10x10m Plots, Lamlahak Subwatershed, Lake Sebu, South Cotabato 86 27 Values and Diversity Indices of Site 6, Lamlahak Subwatershed, Lake Sebu, South Cotabato 87 28 Diversity of Site 5 in Tawolon, Lamlahak Subwatershed, Lake Sebu, South Cotabato 88 Taxonomic Distribution of Two Transects (Sites 5 and 6), Lamlahak Subwatershed, Lake 29 89 Sebu, South Cotabato The Comparison of the Growth Habit in Two Transects (Sites 5 and 6), Lamlahak 30 89 Subwatershed, Lake Sebu, South Cotabato Diversity of Plants in Two Transects (Sites 5 and 6), Lamlahak Subwatershed, Lake Sebu, 31 90 South Cotabato 32 List of Threatened Plant Species, Lamlahak Subwatershed, Lake Sebu, South Cotabato 91 33 Plant Endemism, Lamlahak Subwatershed, Lake Sebu, South Cotabato 91 Taxonomic Distribution of Wildlife Vertebrates, Lamlahak Subwatershed, Lake Sebu, South 34 92 Cotabato 35 Wildlife Species Distribution in All Sites, Lamlahak Subwatershed, Lake Sebu, South Cotabato 93 Wildife Species Present in All Sampling Sites, Lamlahak Subwatershed, Lake Sebu, South 36 93 Cotabato Faunal Species Composition In Seven Sampling Sites, Lamlahak Subwatershed, Lake Sebu, 37 94 South Cotabato iii Table Title Page Wildlife Species Importance values (IV), Lamlahak Subwatershed, Lake Sebu, South 38 95 Cotabato Importance Values (IV) of Amphibians, Lamlahak Subwatershed, Lake Sebu, South 39 96 Cotabato 40 Importance Values (IV) of Reptiles, Lamlahak Subwatershed, Lake Sebu, South Cotabato 97 41 Importance Values (IV) of Mammals, Lamlahak Subwatershed, Lake Sebu, South Cotabato 98 42 Importance Values (IV) of Avifauna , Lamlahak Subwatershed, Lake Sebu, South Cotabato 99 43 Species Diversity of All Sites, Lamlahak Subwatershed, Lake Sebu, South Cotabato 100 44 Endemic and Threatened Species, Lamlahak Subwatershed, Lake Sebu, South Cotabato 101 List of Threatened Species based on DENR DAO Assessment Categories , Lamlahak 45 102 Subwatershed, Lake Sebu, South Cotabato 46 Trophic Groups of Wildlife, Lamlahak Subwatershed, Lake Sebu, South Cotabato 103 47 Trophic Groups, Lamlahak Subwatershed, Lake Sebu, South Cotabato 104 List of Domesticated Animals Observed in Lamlahak Subwatershed, Lake Sebu, South 48 105 Cotabato 49 Dominant families of Arthropods, Lamlahak Subwatershed, Lake Sebu, South Cotabato 106 50 Order Distribution of Arthropods, Lamlahak Subwatershed, Lake Sebu, South Cotabato 107 51 Importance Values of Arthropods Lamlahak Subwatershed, Lake Sebu, South Cotabato 108 52 Diversity of Arthropods, Lamlahak Subwatershed, Lake Sebu, South Cotabato 108 53 Order Distribution on All Sites, Lamlahak Subwatershed, Lake Sebu, South Cotabato. 109 Arthropod Order with Number of individuals per Site, Lamlahak Subwatershed, Lake Sebu, 54 110 South Cotabato iv LIST OF FIGURES Figure Title Page 1 Location of Lamlahak Subwatershed, Lake Sebu, South Cotabato 11 2 Boundaries of Lamlahak Subwatershed Lake Sebu, South Cotabato 12 3 Topography of Lamlahak Subwatershed Lake Sebu, South Cotabato 14 4 Elevation of Lamlahak Subwatershed, Lake Sebu, South Cotabato 15 5 Slope of Lamlahak Subwatershed, Lake Sebu, South Cotabato 17 6 Slope Aspect of Lamlahak Subwatershed, Lake Sebu, South Cotabato 19 7 Climate Map of the Philippines 20 8 Climate of Lamlahak Subwatershed Lake Sebu, South Cotabato 21 9 Frequency of Cyclones in the Philippines 23 10 Hydrology of Lamlahak Subwatershed Lake Sebu, South Cotabato 26 11 Groundwater Availability of the Philippines 27 12 Geology of Lamlahak Subwatershed Lake Sebu, South Cotabato 29 13 Land Use/Land Cover of Lamlahak Subwatershed Lake Sebu, South Cotabato 32 14 Distribution of Active Faults and Trench of the Philippines 34 15 Earthquake Hazard and Risk of the Philippines 35 16 Risk to Earthquake-related Hazards (Landslides and Tsunamis) of the Philippines 36 17 Distribution of Volcanoes and Risk to Volcanic Eruptions in the Philippines 37 Geographical Location of the Seven Sampling Sites and Treatment Plots, Lamlahak 18a Subwatershed Lake Sebu, South Cotabato 41 Geographical Location of the 24 Treatment Plots, Lamlahak Subwatershed Lake Sebu, South 18b Cotabato 42 Geographic Location of the Site 1(Wildlife Vertebrates and Arthropods), Lamlahak 18c Subwatershed Lake Sebu, South Cotabato 43 Geographic Location of the Site 2 (Wildlife Vertebrates and Arthropods), Lamlahak 18d Subwatershed Lake Sebu, South Cotabato 44 Geographic Location of the Site 3 (Wildlife Vertebrates and Arthropods), Lamlahak 18e Subwatershed Lake Sebu, South Cotabato 45 Geographic Location of the Site 4 (Wildlife Vertebrates and Arthropods), Lamlahak 18f Subwatershed Lake Sebu, South Cotabato 46 Geographic Location of the Site 5 (Flora, Wildlife Vertebrates and Arthropods), Lamlahak 18g Subwatershed Lake Sebu, South Cotabato 47 Geographic Location of the Site 6 (Flora, Wildlife Vertebrates and Arthropods), Lamlahak 18h Subwatershed Lake Sebu, South Cotabato 48 Geographic Location of the Site 7 (Wildlife Vertebrates and Arthropods), Lamlahak 18i Subwatershed