1. Introduction & Conceptual Definition

Marine resources encompass all biotic (living) and abiotic (non-living) matter, materials, and energy forms found within oceanic waters, the sea floor, and the underlying subsoil. Covering approximately 71% of the Earth’s surface and holding 97% of the planet’s water, oceans act as global commons, climate regulators, and crucial drivers of global economic growth.

2. Conceptual Classification Diagram

                         ┌────────────────────────────────────────┐
                         │            MARINE RESOURCES            │
                         └───────────────────┬────────────────────┘
                                             │
      ┌──────────────────────────────────────┼──────────────────────────────────────┐
      │                                      │                                      │
┌─────┴──────────────────┐        ┌──────────┴─────────────┐             ┌──────────┴─────────────┐
│ 1. BIOTIC (LIVING)     │        │ 2. ABIOTIC (MINERALS)  │             │ 3. OCEAN ENERGY & SERVICE│
└─────┬──────────────────┘        └──────────┬─────────────┘             └──────────┬─────────────┘
      ├─ Capture Fisheries                   ├─ Hydrocarbons (Oil & Gas)            ├─ Tidal & Wave Energy
      ├─ Aquaculture/Mariculture            ├─ Polymetallic Nodules (PMNs)         ├─ OTEC (Thermal)
      ├─ Coral Reefs & Seaweeds              ├─ Monazite & Heavy Mineral Sands      ├─ Seaborne Tourism & Trade
      └─ Marine Pharmacology                 └─ Dissolved Salts & Fresh Water       └─ Carbon Sequestration

3. Economic Significance of Marine Resources

A. Biotic Resources & Global Food Security

• Commercial Fisheries & Employment: According to the FAO, over 58.5 million people are directly employed worldwide in primary fish production (with 21% being women). The global aquaculture farm gate value was estimated at USD 281.5 billion in 2020, with finfish farming accounting for 66% of output.

• Marine Farming & Ocean Ranching: Controlled culturing of marine organisms (oysters, mussels, scallops, shrimp, milkfish). Norway leads salmon ranching globally, producing ~1.4 million metric tons annually.

• Marine Pharmacology: Bio-prospecting yields valuable pharmaceuticals (e.g., shark/cod liver oil, anti-cancer compounds derived from sea sponges like Cytarabine, and alginates/agar from seaweeds).

B. Abiotic Mineral & Energy Resources

• Offshore Hydrocarbons: Continental shelves are global energy hubs. Total revenue for the offshore oil and gas sector reached $4.3 trillion in 2023. The USA leads petroleum production (18.6 million barrels/day; ~20% of global output), followed by Saudi Arabia, Russia, and Canada.

• Heavy Minerals & Radioactive Sands: India is the largest producer of Monazite, found in the coastal placer sands of Kerala and Odisha. Monazite contains Thorium and Uranium, which are strategic inputs for space technologies and India’s Three-Stage Nuclear Power Programme.

• Deep-Sea Bed Minerals (PMNs): Polymetallic Nodules in the abyssal plains (e.g., Clarion-Clipperton Zone, Central Indian Ocean) contain Manganese, Copper, Nickel, and Cobalt (essential for EV batteries and military aircraft).

• Dissolved Salts & Manufactured Water: Ocean water contains 35 ppt salinity, with 85% comprising Sodium Chloride. In India, Gujarat produces over 50% of the country’s total salt output. Desalination is critical in arid regions, led by Saudi Arabia and the United States (California & Florida).

• Renewable Marine Energy: High-density, zero-emission tidal and wave energy. India’s total identified tidal energy potential is 12,455 MW, with key sites in the Gulf of Khambhat, Gulf of Kutch, and Sundarbans.

4. India’s Strategic Maritime Context

GEO Focus — India’s Exclusive Economic Zone (EEZ):

India boasts an EEZ spanning 2.02 million square kilometers and a coastline of 7,516 km. The coastal economy directly sustains over 4 million fisherfolk. Key flagships include the Deep Ocean Mission (Samudrayaan) for deep-sea mining (75,000 sq. km allotted in CIOM) and the National Blue Economy Policy.

5. Impact of Marine Pollution on Marine Resources

Anthropogenic activities—from land-based runoff to offshore industrial drilling—severely degrade marine ecosystem functions and reduce economic productivity.

6. Way Forward & Global Governance Frameworks

1. UNCLOS & BBNJ Treaty: Enforce the High Seas Treaty to safeguard marine biodiversity in areas beyond national jurisdiction.

2. Integrated Coastal Zone Management (ICZMP): Balance economic exploitation with marine spatial planning to eliminate land-based ocean pollution.

3. Decarbonization & Circular Economy: Mandate IMO MARPOL norms for shipping emissions and phase out single-use plastics under global plastic treaties.

Frequently Asked Questions (FAQs)

Q1. What is the distinction between territorial waters and the Exclusive Economic Zone (EEZ) under UNCLOS?

Answer: Under the UN Convention on the Law of the Sea (UNCLOS), Territorial Waters extend up to 12 nautical miles from the coastal baseline, over which the state exercises full sovereignty. The Exclusive Economic Zone (EEZ) extends from the edge of the territorial sea up to 200 nautical miles, where the state has sovereign rights over the exploration, exploitation, and management of natural resources (living and non-living), but must allow freedom of navigation to foreign vessels.

Q2. How does marine pollution trigger coastal economic losses through “Red Tides”?

Answer: “Red Tides” or Harmful Algae Blooms (HABs) occur when excess nitrogen and phosphorus from agricultural runoff and untreated sewage enter coastal waters. The algae proliferate rapidly and produce potent neurotoxins (such as Saxitoxins) that accumulate in filter-feeding shellfish. Consuming affected shellfish causes Paralytic Shellfish Poisoning (PSP) in humans, forcing ban enforcement on commercial harvesting, closing beaches to tourism, and causing severe financial losses to coastal economies.

Q3. Why are Polymetallic Nodules (PMNs) considered a frontier resource for the clean energy transition?

Answer: Polymetallic Nodules located on abyssal plains (4,000–6,000 meters deep) are rich in Nickel, Cobalt, Copper, and Manganese. These metals are critical raw materials required for manufacturing high-density lithium-ion batteries, electric vehicle (EV) drivetrains, and grid-scale storage systems essential for transitioning away from fossil fuels.