Statistical rigour

See how strong the evidence is, not just the trend.

MariMap runs Mann-Kendall trend tests and Sen's slope estimation on your monitoring indicators. Every chart can show the underlying p-value, effect size (tau), Sen's slope, and 95% confidence interval. You can see exactly how strong the evidence is for a reported trend.

There is strong evidence that live coral cover is decreasing.

Your monitoring has a 78% chance of detecting real changes of this size.

Example: plain-English output from a Mann-Kendall trend test with power analysis.

See every metric and its methodology →

Analytics

Analytics capabilities

Biodiversity indices

Shannon diversity, Simpson index, species richness, and evenness. MariMap calculates these automatically from survey data and provides confidence intervals so you can assess the reliability of every result.

Trend analysis

Trend analysis applied to your monitoring indicators. See whether coral cover, fish biomass, or water quality parameters are improving, declining, or stable over time.

Health indicators

A composite Health Performance Index combines multiple ecological metrics into a single site-level score. Track how site health evolves across monitoring periods and compare performance between locations.

Data quality scoring

Automated checks evaluate survey completeness, species identification confidence, spatial accuracy, and temporal consistency. Every dataset receives a quality score so you can identify gaps before they reach reports.

Interactive charts and visualizations

Bar charts, line charts, scatter plots, heatmaps, spatial maps, and more. Every chart is interactive, supports filtering by date range or site, and can be exported as an image or included in reports.

Statistical rigour

Mann-Kendall trend tests and Sen’s slope estimation validate every reported trend. Each result includes a p-value, effect size, Sen’s slope, and 95 % confidence interval so you can distinguish real change from noise before sharing findings with funders or verifiers.

Reporting

Report builder

Build reports by selecting surveys, date ranges, and output sections. MariMap compiles your data into structured documents with charts, summary tables, and narrative sections that describe what the numbers mean for conservation outcomes.

Interoperability

Export formats

MariMap supports 5 export formats designed for interoperability with global biodiversity databases and reporting frameworks.

Darwin Core Archive (for OBIS/GBIF submission)
GCRMN (Global Coral Reef Monitoring Network format)
GeoJSON (for GIS integration)
CSV/spreadsheet (for data analysis)
PDF (for stakeholder and funder reports)

Overview

Dashboard

The MariMap dashboard gives you a snapshot of your monitoring program at a glance. See active sites, recent survey activity, key biodiversity indicators, and alerts that require attention, all in one place.