Biological diversity (biodiversity in short) is an entity, which encircles different types of animal, bird, fish, mammal, reptile, insect, plant, fungi, etc. in its domains. The genetic compositions of which they are made up of as well as the ecosystem in which they dwell & survive form a part of it. Nature has made everything in this world to thrive and sustain itself without the threshold limit being crossed. But the over-exploitation of available resources by human being for various commercial reasons has created an imbalance in the biodiversity.
The State of Goa is the smallest of all the States in the country yet, it shows an astonishing diversity of endemic species, habitats and ecosystems. Goa is under the influence of two global biomes - the marine biome of the Arabian Sea and the terrestrial forest biome of the Western Ghats. Within this geographical canvas are a wide range of ecosystems and habitats e.g. forests, Ghats, alluvial plains, coasts, rivers, estuaries, mangroves, wetlands, etc. The eco-physiology of the habitats is governed by complex ecological and meteorological conditions. There are normal habitats and extreme habitats (like the rock pools and the salt pans). There are microhabitats which are equally important - e.g. the termite mounds which play a significant role in the decomposition of plant litter. The status of biodiversity in each of these habitats varies, depending naturally on a variety of genetic and environmental factors.
Goa's Biodiversity at a Glance Taxa Catalogued No Remarks       FLORA       I. Microbes     a. Virus 30   b. Yeasts 150   c. Bacteria 150   d. Fungi     - Terrestrial NA   - Aquatic NA   - Marine NA   II Algae     - Terrestrial NA   - Fresh water 156   - Marine 50   III. Bryophytes NA   IV. Pteridophytes NA   V. Angiosperms 1750 Includes domesticated varieties VI. Gymnosperms 1         FAUNA     I. Invertebrata     - Protozoa NA   - Porifera NA   - Coelenterata NA   - Platyhelminthes NA   - Aschelminthes NA   - Nematoda 10   - Annelida NA   - Arthropoda 112   - Arachnida 30   - Crustacea 82     - Mollusca     Bivalvia 28   Gastropoda 63   Cephalopoda 02   - Echinodermata NA   II. Protochordata     - Hermichordata NA   III. Vertebrata or Chordata     - Pisces 205   - Reptilia 49   - Aves 357   - Mammalia 45
Source: NBSAPS Report