In the context of ecosystem productivity, marine upwelling zones are important as they increase the marine productivity by bringing the 1. decomposer microorganisms to the surface. 2. nutrients to the surface. 3. bottom-dwelling organisms to the surface. Which of the statements given above is/are correct?

1. Statement 1 is incorrect: While decomposer microorganisms are present in deeper waters breaking down organic matter, the primary benefit of upwelling for marine productivity is the transport of the dissolved nutrients they release, not the microbes themselves, to the surface. 2. Statement 2 is correct: Marine upwelling zones involve the movement of deep, cold, nutrient-rich water towards the surface. These nutrients (like nitrates, phosphates, and silicates), which accumulate in deeper waters from decomposition, fertilize the sunlit surface waters (photic zone). This stimulates the growth of phytoplankton, the base of the marine food web, thereby significantly increasing marine productivity. 3. Statement 3 is incorrect: Upwelling primarily involves the movement of water and dissolved substances. While it might displace some smaller organisms, it doesn't typically bring large numbers of bottom-dwelling organisms (benthos) to the surface. The increased productivity supports organisms throughout the water column, including those that feed on phytoplankton, rather than being caused by lifting bottom dwellers.