Fish Need Wood - Here Is Why
You may not have thought about this before but it is a fact that fish indeed need wood to sustain them in certain areas. Here are the reasons why.
- It can help spawning gravels to accumulate. It stops the gravel from moving downstream. This is especially important for fish such as salmon. If this weren't possible, bears would go hungry in certain areas.
- Pools can form behind the wood debris. It provides an important habitat for rearing juveniles.
- Wood can help slow down the speed of the stream. In doing so, it helps adults to move upstream and, at the same, time will shelter the juveniles keeping them from using too much energy against the currents.
- The wood provides shade which allows for cooler waters in pockets that helps effect the temperature of the whole stream by lowering it.
- Fish have tiny brains so their instinct to hide is all they use. However, if they find themselves within a large portion of wood debris and branches along with a few spiky pieces, it will allow them a refuge from predators.
- Beavers are known to create dams out of wood. If these dams are near banks, then this will stabilize the banks themselves. It automatically stops erosion and decreases any sediment movement. This would harm a downstream fish habitat.
- Wood is important to the aquatic food chain. It traps organic matter providing a habitat for insects and invertebrates. The fish can then eat them.
If you come across wood strewn across a stream as you are camping and disturb these while hiking, you could be most likely disturbing a fish refuge; which could enable predators to find them. Enjoy the outdoors as you normally would but be aware that you are actually walking through animal land.
| Conservation | #Sustainability | #Fish | #Restoration | #Ecology | #Streams | #Rivers |