You don’t have to look too far in a coastal setting to get a sense for how high the tide has come in. Just follow the wrack zone! The wrack zone, or “wrack line” is most commonly associated with a sandy beach habitat but can also be present in rocky shores, mangroves, salt marshes, and other coastal systems. The wrack zone is a coastal feature where organic material (e.g kelp, seagrass, shells) and other debris is deposited at high tide. This zone acts as a natural input of marine resources into a terrestrial system, providing food and habitat for a variety of coastal organisms. Terrestrial invertebrates such as isopods, amphipods, polychaetes, and shore flies feed on seaweed and other dead material. These invertebrates provide food for shore birds and other predators on the beach. In addition, when organic debris decomposes, it delivers nutrients to the soil, promoting the growth of coastal vegetation. #wrackline #wrackzone #hightide #nsrwa #northriver #southriver #watershedwednesday
Good morning from the wildlife refuge directly across Oso Bay from campus!!!! 🙃 #canyounot
Wanted to post this for #throwbackThursday
. I found this at the beach on Monday afternoon! I reached down assuming I was picking up a piece of a phone case, flipped it over and BOOM....epic nostalgia! I wonder how it got here, where it came from, and how LONG this sucker was floating around in the ocean.. Sun bleached and cracked, but the logo is still totally visible. Blew my mind.
It’s a good morning to play ‘name that isopod.’ This is Pentidotea, probably P. wosnesenskii. I didn’t disturb them to get a head count but there are at least four here, two above the big one and at least one beneath. What are they up to?
Pentidotea’s claws exert a strong grip. They can take the force of a wave without taking a tumble in the swash. I came upon these in May, 2018.
#intertidal #pnw #oregoncoast #OregonShores #wrackline #crustaceans #isopodsofinstagram #tbt
following the wrack line 🌊
Happy Friday! ✨ I went to the beach after class today. I decided that today I wanted to expand my mind on the local micro/macroplastics. I knew they were there, but I have never REALLY gotten down on their level here on the island. It’s shocking how easy it is to find all of this, and tons more not pictured. And within such a small amount of beach. The tiniest pieces I kept in the McDonald’s cup: styrofoam/plastic beads and broken bits of plastic. I didn’t walk up and down a stretch of beach to find these. I literally got out of my car, threw a beach towel down, and started looking in the wrack line of the sand (where the high tide washes debris up). That is what’s so crazy. I’m just one person, this is one little patch of beach, and this isn’t even a minor dent. Microplastics are killing marine life, infiltrating our drinking water and food, and leaching chemicals. How is this NOT a problem? Recycle at the very least, but most importantly refuse single use, pay attention to what corporations you’re supporting, speak up for the planet and treat it with respect.
When you’re walking a low tide line and come across a scene like this, it means one thing- a helmet crab (Telmessus cheiragonus) has met its match. Within a minute I discovered the carapace shown in the second photo | Orcas Island, WA
#fbf #intertidal #beachcombing #wrackline #crustacean