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Term Main definition
in-situ conservation

Conditions where genetic resources exist within ecosystems and natural habitats, and in the case of domesticated or cultivated species, in the surroundings where they have developed their distinctive properties.

indicator species

An organism, species or community that shows the presence of specific environmental conditions.

Indigenous Cultural Community

A group of people or homogenous societies identified by self-ascription and ascription by others, who have continuously lived as organized community on communally bounded and defined territory, and who have, under claims of ownership since time immemorial, occupied, possessed and utilized such territories, sharing common bonds of language, customs, traditions and other distinctive cultural traits, or who have, through resistance to political, social and cultural inroads of colonization, non-indigenous religions and cultures, became historically differentiated from the majority of Filipinos. An ICC or IP shall likewise includes peoples who are regarded as indigenous on account of their descent from the populations which inhabited the country, at the time of conquest or colonization, or at the time of inroads of non-indigenous religions and cultures, or the establishment of present state boundaries, who retain some or all of their own social, economic, cultural and political institutions, but who may have been displaced from their traditional domains or who may have resettled outside their ancestral domains.

Synonyms - Indigenous People,ICC,IP
indigenous knowledge systems and practices

Systems, institutions, mechanisms, and technologies comprising a unique body of knowledge evolved through time that embody patterns of relationships between and among people and between people, their lands and resource environment, including such spheres of relationships which may include social, political, cultural, economic, religious spheres, and which are the direct outcome of the indigenous people's responses to certain needs consisting of adaptive mechanisms which have allowed indigenous people to survive and thrive within their given socio-cultural and biophysical conditions

indigenous political structures

Organizational and cultural leadership systems, institutions, relationships, patterns and processes for decision-making and participation, identified by ICCs/IPs such as, but not limited to, Council of Elders, Council of Timuays, Bodong Holders, or any other tribunal or body of similar nature.

individual claims

Claims on land and rights thereon which have been devolved to individuals, families and clans including, but not limited to, residential lots, rice terraces or paddies and tree lots.

Industrial Forest Plantation

Any tract of land planted mainly to timber producing species, including rubber, or non-timber species such as rattan and bamboo, primarily to supply the raw material requirements of existing or proposed wood processing plants and related industries.

industrial roundwood

All round wood except fuel wood comprising of saw logs, veneer logs, and round and split pulpwood.


The movement of water through the soil surface into the ground.

infrastructure development land use

An area where infrastructure development can occur. Includes special economic zones, grasslands and ancestral domains.

Initial Environment Examination

The document required from a proponent describing the environmental impact of, and mitigation of and enhancement measures of a project of undertaking located in an environmental critical area.

inland water

The bodies of water surrounded by land (e.g. rives, lakes, streams, mudflats, ponds or fishponds, dams and reservoirs).

insulation board

A fiberboard with density not exceeding 500 kg per cubic meter.

Integrated Forest Management Agreement

An agreement entered into by the DENR and a qualified person to occupy and possess in consideration of a specified rental, any forestland of the public domain in order to establish as industrial forest.

Synonyms - IFMA
Integrated Protected Area Fund

The special account established for the purpose of financing projects of the NIPAS and individual protected areas.

Synonyms - IPAF