More green plants don’t equal more fish in our waterways – here’s why

Aquatic plants supply food, shelter and oxygen for the fish and other aquatic life that share their environment. Pretty important stuff. So, logically, the more plants in the pond the better, right? Well, sort of.

While native aquatic plants are certainly a good thing, there’s a growing contingent of non-native interlopers in these parts. At least 10 species in The Woodlands water bodies appear on the Texas Parks and Wildlife Department’s prohibited species list. These invasive species are illegal to sell, distribute, import, possess, or introduce into Texas waters.

Texas Parks and Wildlife Department has identified several plants as illegal to sell, distribute, import, possess or introduce into Texas waters. Some plants on the above list are not yet prohibited but are known invasive plants in The Woodlands.

The problem starts with the unfair advantage that non-native invasive plants enjoy: fewer natural controls than their native counterparts. This allows them to spread easily and choke out the natives. And as native plants disappear, so do many of our native fish species and other life who simply can’t adapt.

These invasives don’t need any help. Yet, we give them plenty by turbocharging their growth with lawn chemicals. Rain and irrigation readily carry chemicals from lawn to storm drain to local waterway. There they fertilize aquatic plants just as they do your grass. All the excessive growth that results eventually dies and decomposes, consuming oxygen in the process – A LOT of it. So much in fact that oxygen-depleted dead zones result – not good if you’re an aquatic organism. If you’ve ever seen fish floating at the top of a pond, particularly in the summer, this is a likely reason.

In short, invasive aquatic plants bring a slew of bad news.

BUT there’s good news, too! With a couple of simple steps, you can help turn the tide. In fact, more and more residents across The Woodlands are doing exactly that.

Step 1 – Remove all non-native plants from your landscape. Even if they aren’t an aquatic species, they still risk escaping into natural areas. Remember, plants don’t have to grow their way to new areas; seeds are great at dispersing by wind or bird.

Step 2 – Reduce, or even better, eliminate chemical use in your yard. Substitute organic products in their place. Did you know organic compost is probably the single best amendment for your yard?

Support your local fish populations, and all the other critters that depend on clean, healthy water. Remember to: Remove, Plant, Repeat! Remove invasive species, plant natives and repeat the process.

Learn more during Watershed Project: Aquatic Invasive Species, an online workshop scheduled for June 5, 2021, from 9 to 11 a.m. The workshop is FREE, but registration is required. Click the button below to register.


Questions or comments?

Email enviro@thewoodlandstownship-tx.gov


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Why care about invasive plants?

If it’s green it’s good, right? Well, not quite. Invasive plants do add green to our surroundings, some quite strikingly. In the process, though, they cause serious environmental damage. Let’s take a deeper look at the problem with invasive plants and how they disrupt an ecosystem. 

Invasives tend to grow quickly, out competing native vegetation for available nutrients. Invasive vines, especially, can overgrow native trees and plants, smothering out the sunlight. Native wildlife loses habitat when these changes occur. 

Soil chemistry suffers at the hands of invasives, as well. When native vegetation is thriving in healthy soil, their root systems create stability, supply water and essential nutrients, and return more nutrients when they decompose. They help maintain the soil chemistry, its physical structure, and sustain essential soil microbes whose job it is to help store and supply water to plants. Non-native, invasive plant roots interrupt these unseen but essential processes which are the foundation of a healthy forest.

Volunteers remove invasive plants along a pathway in The Woodlands. Photo courtesy of Kathie Herrick

Nearly 100 residents have joined The Woodlands Township Invasive Task Force to combat these problems. This group of trained volunteers removes invasive plants from pathways and greenbelts, helping sustain our native species. You can help, too.  As summer turns to fall, many invasives are at their most prolific and your help is needed. Keep your eyes open and report invasive species on the pathways when you see them. Not sure which are the bad guys? How about watching for just these three: Japanese climbing fern, nandina (sometimes called heavenly bamboo), and elephant ears. Learn and identify more with this guide to invasive species of the Galveston Bay Area. Then use The Woodlands Township 311 app on your phone to report your sighting of these plants.  

If you would like to join the removal work, join us on August 15, 2020. The Environmental Services Department will host a training class on invasive species. You’ll leave informed, inspired and ready to join the Task Force. Register for the class using the link below.


Questions or comments? Email enviro@thewoodlandstownship-tx.gov

TURF WAR: THE BATTLE BETWEEN INVASIVE AND NATIVE PLANTS

Everyone needs a home. For pollinators, and every other organism, that home, or habitat, means food, water, shelter and space. But what happens when our Texas pollinators can’t find a home? Well, it’s fairly simple; their numbers decline, often dramatically. And while there are many causes of habitat loss, some of the biggest culprits are non-native invasive plants.

One of the easiest and most effective ways for you to help our native pollinators is to avoid planting non-native vegetation and to replace any that currently reside in your landscape with natives. The types of plants, shrubs and trees you choose for your landscape is critical as they are primary providers of both food – pollen, nectar, leaves and seeds – and shelter. Many insects acquire most of their water from the vegetation they eat. Our Texas butterflies depend on Texas native plants for reproduction, laying eggs on the leaves. When the eggs hatch into caterpillars, those young butterflies eat the leaves to sustain themselves as they grow large enough to make their chrysalis, later emerging as adult butterflies. Many pollinators have evolved with native plants, both adapting to the local climate and growing season.  Non-native plants may not provide pollinators with enough nectar or pollen, or the plants may be inedible to some caterpillars.


Native plants play a critical role in the survival of pollinators

The existence of these plants impacts more than just pollinators. Many non-natives become invasive, out-competing existing natives for soil nutrients and crowding them out. Some of the worst offenders in our community include air potato vines, Chinese and Japanese privets, Japanese honeysuckle, Nandina (often called heavenly bamboo), elephant ears, and Japanese climbing fern. While some may look good in our yard and can be effectively managed, their seed or runners often escape into neighboring greenbelts, pathways and open spaces. The resulting loss of native vegetation and habitat value in these areas is never pretty.



Learn more about the challenges posed by invasives and simple steps you can take to help solve the problem. Attend The Woodlands Township Environmental Services Department Invasives Task Force Workshop on Saturday, August 10, from 9 a.m. to 3 p.m. at the HARC Building located at 8801 Gosling Rd. For details and to register for this FREE workshop, click here. Space is limited, so register early to guarantee your spot.