Materials and Method
Study Area
The Western Ghats, a rare repository of endemic flora and fauna
is one of the 35 hotspots of global biodiversity and a home to
diverse social, religious and linguistic group. Uttara Kannada
district located in the central Western Ghats (Fig. 1) lies between
13.769°–15.732°N and 74.124°–75.169°E covering approximately an
area of 10, 291 km2. The region has the distinction
of having highest forest area (80.48%) in Karnataka State,
India, and has been undergoing severe anthropogenic pressures
impacting biogeochemistry, hydrology, food security, climate and
socio-economic systems. The district has varied geographical
features with thick forest, perennial rivers and abundant flora,
fauna. It has the unique distinction of having 3 agro-climatic
zones and for the regional administrative purpose, the district
is further divided into 11 taluks (also known as tehsil or
mandal is an agglomeration of villages). The coastal region,
which has hot humid climate and rainfall, varies between 3000
and 4500 mm. The Sahyadri interior region of the Western Ghats
(500–1000 m high)is very humid to the south (rainfall varies
from 4000 to 5500 mm). The plains are regions of transition,
which are drier (rainfall varies between 1500 and 2000 mm).
Fig. 1 Study area: Uttara Kannada district,
Karnataka state, Central Western GhatsMethod
Local hotspots of biodiversity or ESRs in the district are
prioritized considering biological (terrestrial and aquatic
flora and fauna, estuarine biodiversity), ecological (diversity,
endemism, conservation reserve), geo-climatic (altitude, slope,
rainfall), renewable energy prospects (bio, solar, wind), social
(population, forest-dwelling communities) as outlined in Fig. 2. The study area has been
divided into 51 51 equal area grids (168)
covering approximately 9 9 km2 (Fig. 3) for prioritizing ESR.
Table 1 lists the weightages assigned
to each variable of various themes consider- ing the minimal
impact on the landscape and also to prioritize conservation
regions for future planning. The weightages were assigned
iteratively across the landscape with varied themes for a
development solution and monitoring.
Developing a weightage metric score analysis requires knowledge
of multidis- ciplines [16], and
planning integrates the present and future needs in the
landscape [17], and weightage is
given by
Fig. 2 Weightage metric criteria for prioritizing
ESRConservation and Sustainable
Management … 369
Fig. 3 Grids with the
distribution of transects and transect cum quadrats (2 of 5 quadrats
of 20 20 m only shown). Shaded grids are the representative grids
chosen based on agro-climatic zones for field data collection
Weightage = Σni=1WiVi
where n is the number of data sets (variables), Vi
is the value associated with criterion i, and
Wi is the weight associated with that
criterion. Table 1 expresses the
theme- wise decision variable considered with their level of
significance, ranked between 1 and 10. Value 10 corresponds to
highest priority for conservation, whereas 7, 5 and 3 correspond
to high, moderate and low levels of prioritization. Assigning
weightages based on individual proxy based extensively on GIS
techniques has proved to be the most effective for prioritizing
ESR. Visualization of levels of ESR helps the decision- makers
in opting eco-friendly development measures. A detailed database
has been created for various themes covering all aspects from
land to estuarine ecosystem. The theme-wise description given
below highlights the consideration of variables for study and
their significance in conservation priority.
Table 1 Various themes
considered and their weightages
S. no |
Themes |
Weightages/ranking |
Theme |
1 |
3 |
5 |
7 |
10 |
1. |
Land-use |
FC < 20% |
20 < FC < 40% |
40 < FC < 60% |
60 < FC < 80% |
FC > 80% |
Land |
Interior forest |
IF < 20% |
20 < IF < 40% |
40 < IF < 60% |
60 < IF < 80% |
IF > 80% |
2. |
Flora |
NEND |
END < 30% |
30 < END < 50% |
50 < END < 70% |
END > 70% |
Ecology |
Tree diversity |
SHD < 2 |
2 < SHD < 2.5 |
2.5 < SHD < 2.7 |
2.7 <SHD <3 |
SHD > 3 |
Fauna |
– |
NEND |
– |
– |
END |
Conservation reserves (CR) |
– |
– |
– |
– |
National parks, wildlife reserves, Myristica
swamps,
Sanctuaries |
Biomass (Gg) |
BM < 250 |
250 < BM < 500 |
500 < BM < 750 |
750 < BM < 1000 |
BM > 1000 |
3. |
Altitude slope |
– |
– |
– |
Slope > 20% |
Slope > 30% |
Geo-
climatic |
Precipitation |
– |
1000 > RF > 2000 mm |
2000 > RF > 3000 mm |
3000 > RF > 2000 mm |
RF > 4000 mm |
4. |
Stream flow |
WA < 4 |
4< WA <6 |
6< WA <9 |
9< WA <12 |
WA = 12 |
Hydrology |
5. |
Solar |
– |
– |
<5 KWh/m2/day |
5–6 KWh/m2/day |
6–6.5
KWh/m2/day |
Energy |
Wind |
– |
– |
2.4–2.55 m/s |
2.5–2.6 m/s |
2.6–2.7 m/s |
Bio |
SD < 1 |
SD > 1 |
1>SD <2 |
2<SD <3 |
SD > 3 |
6. |
Population density (PD) |
PD > 200 |
100 < PD < 200 |
100 < PD < 150 |
50 < PD < 100 |
PD < 50 |
Social |
Forest- dwelling
communities (tribes) |
– |
Tribes are present then assigned 10; if
no tribal population exists, then assigned as 0 |
|
7. |
Estuarine regions |
– |
Low |
Moderate |
High |
Very high |
Estuarine diversity |
FC–forest cover; IF–interior forest cover; END–endemic;
NEND–non-endemic; BM–biomass; SD–supply to demand ratio;
WA–water availability Land
Land uses based on the analysis of remote sensing data were
considered, and grids were prioritized based on the proportion
forest cover [18]. Forest
fragmentation statistics is computed as per the standard
protocol [18, 19]. The interior forest cover
refers to the undisturbed core forest patches that aid in
preserving the structure of the ecosystem while enhancing its
functional aspects. Ecology
Field investigations were carried out in 116 sample transects
(Fig. 4) for data on the plant
species diversity, basal area, biomass, estimates of carbon
sequestration, per- centage of evergreenness and Western Ghats
endemism and about the distribution of threatened species, etc.
Along a transect length ranging up to 180 m, quadrats
each of 20 20 m were laid alternatively on the right and left,
for tree study (min- imum girth of 30 cm at girth at breast
height (GBH) or 130 cm height from the ground), keeping
intervals of 20 m length between successive quadrats. A number
of quadrats per transect depended on species–area curve, and
most transects had a maximum of five quadrats. Within each tree
quadrat, at two diagonal corners, two sub-quadrats of 5 m 5 m
were laid for shrubs and tree saplings (<30 cm girth). Within
each of these two herb layer quadrats, 1 m2 area each
was also laid down for herbs and tree seedlings. Supplementary
data were compiled through the review of published literature,
unpublished datasets and ground-based surveys other than
transects. Approaches adopted in documenting flora and fauna are
outlined by earlier studies [20].
The health of ecosystem and its significance is derived based on
the key vari- ables—endemism, floral diversity, evergreenness,
etc., for evolving the composite conservation index. Tree
species diversity is another measure calculated using Shannon’s diversity index (H1). H1 is given by
Eq. (H)' = -Σni=1(Pi)lnPi
where i is the proportion of the species relative to the
total number of species (pi) multiplied by
the natural logarithm of this proportion (ln
pi) and the final product
Fig. 4 Framework of the SDSSmultiplied by 1.
The Shannon index ranges typically from 1.5 to 3.5 and rarely
reaches 4.5. Higher diversity range was assigned higher weightage
for conservation.
Faunal diversity is another surrogate variable used to assess the
eco-sensitivity of a region. The region is storehouse of endemic
fauna, in which occurrence of endemic species increases in the
undulating terrains of upper Ghats. Species richness and
endemism are two key attributes of biodiversity that reflect the
complexity and uniqueness of natural ecosystems [4, 23]. The setting of regional
conservation prior- ities based on combinations of modelling
individual endemic species’ distributions, evaluating regional
concentrations of species richness and using complementarity of
areas by maximizing inclusion of species in the overall system
is most appro- priate [24]. A set of
criteria for prioritizing the regions has been prepared based on
field investigation, interaction with stakeholders (researchers
working in this region, forest officials, local people, subject
experts).
Mammals are well represented in this chain of mountains, and many
endemic birds are found in all other places of the district.
Conservation Reserves (CR) are being established under the
framework of Protected Areas (PA) under the Wildlife
(Protection) Amendment Act of 2002. CRs are typically buffer
zones or connectors and migration corridors between National
Parks, Wildlife Sanctuaries and reserved protected forests in
the district. These reserves protect habitats that are under
pri- vate ownership also, through active stakeholder
participation. The biological diver- sity in these zones like
National parks, Sanctuaries (Anshi Dandeli Tiger reserve
(ADTR)), botanical gardens (Shalmala Riparian Ecosystem
Conservation Reserve, Aghanashini LTM Conservation Reserve,
Hornbill Conservation Reserve, Attiveri Bird Sanctuary),
zoological gardens hosts threatened (rare, vulnerable,
endangered) flora/fauna. Higher weightage is assigned for
CRs. Biomass
Biomass is another important indicator of forest health and
reveals its role in a global carbon sink. Most of the Uttara
Kannada district is located in the high rainfall zone, except
Mundgod and eastern parts of Haliyal and Yellapura support trees
with higher biomass. Details of biomass quantification, flora
and fauna diversity are available in the literature [16, http://wgbis.ces.iisc.ernet.in/biodiversity/database_new/].
The analysis has calculated total standing biomass of forest’s
vegetation [25, 26] based on field data and
remote sensing data. Transect-wise basal area per hectare was
estimated using allometric equations. Geo-Climatic
Variables
Geo-climate plays a major role in determining the speed of
recovery (lag-time) of a landscape (and the ecosystem that
governs it), and the studies reveal that variables such as
altitude (elevation, slope, rainfall), easterly aspect,
steepness and longer dry seasons have a significant role in
local ecology [27]. The patterns of
altitude,
slope and rainfall bring about the sensitivity, heterogeneity,
complexity of climate, soil, vegetation, land use, land cover in
connection with socio-economic interac- tions [28, 29]. The elevation map is
generated using Cartosat DEM of 1 arc-second resolution. Areas
with steep slopes and high altitudes are likely to be eroded
more easily, and hence vulnerable to natural erosion or
landslides, need to be considered as least resilient and hence
environmentally sensitive zones areas. The analysis has
considered that the slopes and altitudes can be normalized
within each grid from 0 (least average slope or lowest average
altitude) to 10 (high slope and high alti- tude) and assigned to
the grids. The slope map is generated from DEM dataset using Geographical
Resources Analysis Support System
(GRASS)—http://wgbis.ces.iisc.
ernet.in/grass/index.html)—free and open-source tool.
Hydrology provides a fundamental basis for understanding material
flows, envi- ronmental quality and stream ecosystem in a basin [30]. Conservation of high bio-
diversity forest landscapes is justified on the basis of
hydrological benefits—in par- ticular, reduction of flooding
hazards for downstream floodplain populations [31]. Point-based daily rainfall
data from various rain gauge stations in and around the study
area between 1901 and 2010 were considered for analysis of
rainfall [20, 32]. The rainfall data used for
the study were obtained from Department of Statistics,
Government of Karnataka; Indian metrological data (IMD),
Government of India. Rainfall trend analysis was done for
selected rain gauge stations to assess the vari- ability of
rainfall at different locations in the study area. Monthly
monitoring of hydrological parameters reveals that streams in
the catchments with undisturbed pri- mary forest (evergreen to
semi-evergreen and moist deciduous forests with spatial extent
>60% in the respective catchment) cover have reduced run-off
as compared to catchments with disturbed/altered forest covers.
Run-off and thus erosion from monoculture plantation forests
were higher from that of natural forests. Forested catchment has
higher rates of infiltration as soil is more permeable due to
enhanced microbial activities with higher amounts of organic
matter in the forest floor. Streams with undisturbed forest
cover (vegetation of native species) in the catchment showed a
good amount of dry season flow. Native forests in the catchment
aid as sponge retaining the water, while allowing infiltration
during monsoon, which are steadily released during the lean
season. Compared to this, streams in the catchment dom- inated
by agricultural and monoculture plantations (of Eucalyptus sp.
and Acacia auriculiformis) are seasonal with water
availability ranging between 4 and 6 months. The grids where
water is available during all months in a year (perennial flow)
are assigned higher values. Energy
Dependence on the conventional energy resources for electricity
generation is eroding the natural resources at faster rate by
causing a significant adverse effect on ecology by producing
enormous quantities of by products including nuclear waste and
carbon dioxide. Improving energy efficiency, switch over to
renewable sources of energy and de-linking economic development
from energy consumption (particularly of fossil fuels) is essential for sustainable development of a region.
Potential of renewable energy sources is assessed (Solar, Wind,
Bioenergy) month-wise and captured the variations [33–35]. The solar energy datasets
are derived based on NASA’s Surface Meteorology and Solar Energy
(SSE) methodology. The solar energy is available greater than 10
months with higher potential. The availability of wind energy
and its characteristics of Uttara Kannada District have been
analysed based on primary data collected from India
Meteorological Department (IMD) observatories. Wind energy
conversion systems would be most effective during the period May
to August. Energy pattern factor (EPF) and power densities are
computed which show that the coastal taluks such as Karwar,
Ankola and Kumta have good wind potential [34]. The house- holds’ survey
carried out to understand the spatio-temporal patterns in the
domestic fuelwood consumption reveals that 82–90% of the
households still depend on fuel- wood and agro-residues.
Analyses of sector-wise contribution in the energy surplus zones
show that horticulture residues contribute in the central dry
zone, southern transition zone and the coastal zone, while in
the hilly zone, forests contribute more towards the available
bioenergy [35]. The adaptation of
green technologies would aid in cutting down carbon footprint.
Weightages are assigned based on the level and quantum of
availability of energy from renewable resources. Social
Aspects
Forest Rights Act 2006, Government of India, seeks to recognize
and vest the for- est rights and occupation in forest land in
forest-dwelling Scheduled Tribes and other traditional forest
dwellers who have been residing in forests for generations but
whose rights could not be recorded. Forest-dwelling communities
(tribes) of the district are mapped at village level, and the
grids with tribal population are assigned higher weightage. In
the regional planning, demographic aspect is essential to many
applications across the science and policy domains including
assessment of human vulnerability to environmental changes. Land
degradation is due to population pres- sure which leads to
intense land-use conversions without proper management prac-
tices. Increase in population density will lead to the
increasing exploitation of natural resources and the resulting
loss of species and ecosystem richness, nature conserva- tion
[36]. Village-wise population
density is computed considering 2011 population census data (http://censusindia.gov.in).
Population density per sq. km is considered as one of the
influencing social factors for prioritization, and the grids
with lower population density are assigned higher weightage. The
need for combining nature conservation with social aspect is to
emphasize receiving a livelihood from natural resources and
participation in enriching biodiversity. Estuarine
Diversity
Estuarine ecosystems are biologically productive,
socio-economically vital and aes- thetically attractive, while
providing food and shelter for many vital biotic species, and
some are commercially very important [37]. West coast estuaries of
the district were assessed based on productivity, biodiversity and human
pressure [38–40]. The analysis has
identified the mangroves at species level using remote sensing
data with field-based measurements. Estuarine productivity based
on goods and services of the district [38]
brings out the disparity in productivity and diversity between
the neighbouring estuaries due to major human intervention in
the form of construction of hydroelectric projects in upstream.
Estuaries were given weightages based on the productivity and
diversity. SDSS Framework
SDSS integrates the scientific data in addressing the problems
and provides appropri- ate solutions for sustainable utilization
of the resources. OGC provide standardized interface
specifications to support geospatial data sharing and
interoperability among Web-based GIS systems (Fig. 4). SDSS Server GIS framework
(i) is used remotely as data management done by the researchers
and administrators, (ii) provides access to functionality via
Web protocols such as the OGC Web Processing Service and
(iii) allows the users to access the data and enter input
parameters. Web-mapping API such as Openstreet Maps which is one
of the popular Web-mapping application programming interfaces
(APIs) and Bhuvan (http://bhuvan.nrsc.gov.in),
WMS layers are used in our
framework, and other examples are Google Maps
(http://maps.google. co.in), Yahoo! Maps (http://maps.yahoo.com) or Bing Maps (http://bing.com/maps). The online user
will be able to access the graphical user interface
(http://10.58.20. 79/ol3/ukwms.html) and choose the
different map layers [41]. When the
request is received, the Web server communicates with
the GeoServer to retrieve the map layers as a service which will
be fetched from the database and a response is sent to the user
through the GUI. The user will be able to visualize the
information on the maps.
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