slash pines – Everglades Ark

The purpose of this post is to show the details of the scrubby understructure of the flatwood pine of the Estero Bay State Preserve in Estero Florida. Additionally one can see the management of of the ecosystem with prescribed burning. in the first post about this site post we saw the general terrain of the pine flatwood of the State Preserve. Now we can compare this understructure to a previously explored Florida’s hard wood hummock.

The feature image is the Florida State flower. The Tickseed (Coreopsis Leavenworthii)

Scrubby flatwoods are characterized by an open canopy of widely spaced pine trees and a low, shrubby understory dominated by scrub oaks and saw palmetto, often interspersed
with areas of barren white sand.*

This image shows the size of the saw palmetto (Serenoa repens) scrubby flat.

Off the trails, it was very difficult to make any headway. I was insufficiently prepared for the hazards. Because of the dangerous anatomy of the saw palmetto growth, it was nearly impossible to walk. The stems of these palmettos were edged with saw like teeth. Without brush pants, shirt, gloves and boots it was impossible to venture by foot deep into the off-path areas without injury. There may be interesting animals living in this dense razor-sharp growth, however, that will wait for another day. In the future we will investigate these plants and this territory in more detail. I also walked into some of the previously prescribed burn areas.

Possible cogon grass. Seeds not visible. If it is this grass, it is invasive.

Bushy bluestem grass (Andropogon glomeratus)

There were also recently burned areas already showing extensive recovery. In these areas it is easy to see the root structure of the saw palmetto. They are like palm trees lying horizontally just below the surface of the soil. The fronds sprout horizontally from the roots. Without the herbaceous portion of the plants, it was much easier to walk off the path and see the regenerative behavior of the plants.

Roots and pinecones densely littered the surface and were robustly sprouting new growth. I could see no erosion of the soil caused by the surge in the areas with the saw palmetto roots. The burned areas were very interesting. It was evident that the green tops of the saw palmetto burn easily, probably because of their high oil content. The saw palmetto plants burn even when they are green. The surviving palm and pine trees were scorched and trunk surface burned but in the pines not down to the cambium and not into the tree crowns. Prescribed burning is an important part of the control measures for this area and deserve more attention.

Laurel dodder (Cassytha filliformis) Probably invasive vine.

The rich deep brown chromyl spectra of the charred forest ranging from deep chocolates to subtle cafe-au-lait plus the broad textural variety in this setting retains the promise of plant regeneration.

Prescribed burning:

Prescribed burn area showing the exposed sand surface with very low mineral and organic soil content

This view of the postburn area shows the root system holding the soil from erosion

Remnant of the saw palmetto growing from the remaining root

The surface of the slash pine scorched but not burned through to the cambium

The areas with prescribed burning seen a year ago also experienced a heavy flood surge from hurricane Ian. These areas have recovered. There are scorched trees and some deadwood, however, most of the scrub has regrown. It is difficult to distinguish the destruction of the trees from fire or from flood. There were also recently burned areas already showing extensive recovery. In these areas it is easy to see the root structure of the saw palmetto. They are like the trunks of palm trees lying horizontally just below the surface of the soil. The fronds sprout vertically from the roots. Without the herbaceous portion of the plants, it was much easier to walk off the path to see the regenerative behavior of the plants. Roots and pinecones densely littered the surface and were robustly sprouting new growth. I could see no erosion of the soil caused by the surge in the areas with the saw palmetto roots. The burned areas were very interesting. It was evident that the green tops of the saw palmetto burn easily, probably because of their high oil content. The saw palmetto plants burn even when they are green. The surviving palm and pine trees were scorched and surface burned but not down to the cambium on the pines and not into the tree crowns. Prescribed burning is an important part of the control measures for this area and deserve more attention.

Costal plane stagger bush (Lyonia fruticose)

Discussion:

The scrubby flatwood and the flatwood pines or the Estero Bay Preserve are very different from the C.R.E.W. Cyprus Dome walking trails. The concept off highlands in Florida are evident in the CREW when you consider the major differences in flora between the two Preserves. Subtle changes in land height make a remarkable difference in vegetation. One could almost exchange the term ‘Highland’ for “Dryland’. In fact, “High Land” designation could practically be made on the basis of vegetation rather than measurement. That relative dryness provided by a few centimeters on height changes the entire biology of the environment. The height advantaged trees are also phototrophic. They grow toward the light and therefore at their climax are broad leafed and wide spread. The plants of the flats are are geotrophic,. They grow high and narrow. They are not competing for the light once they rise above the scrub. This height advantage allows them to bring the crown of needles out of fire harm’s way. When comparing the role of fire in the two environments, fire in the hardwood climax forest is calamitous while fire in the flats are regenerative. I suspect that the nutrative value of soil in the planes areas will also make an important differences in plant selection.

Tougher clothing is an imperative for exploring the saw palmetto scrub.

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References::

*Scrubby flatwood

Saw Palmetto Control: Individual Plant and Broadcast Application

A Study of the Physical and Chemical Properties of Saw Palmetto Berry Extract

Typical yields in harvestable areas range from a low of 200 lbs. to more than 1000 lbs. of berries per acre.https://patents.google.com/patent/US6669968B2/en

Saw Palmetto Market https://www.futuremarketinsights.com/reports/saw-palmetto-market

Saw Palmetto Berries https://fenuccio-j.medium.com/saw-palmetto-berries-996329cbec20

Forest Herbicide Workshop https://programs.ifas.ufl.edu/media/programsifasufledu/florida-land-steward/events-calendar/Minogue-2021-Forest-Herbicide-Webinar-Pine-Mgmt-FINAL.pdf

Harvesting Saw Palmetto https://sustainableherbsprogram.org/explore/plants-in-commerce/saw-palmetto/harvesting-saw-palmetto/

Sustainability of Saw Palmetto https://www.herbalgram.org/resources/herbalgram/issues/132/table-of-contents/hg132-feat-sawpalmetto/

Saw Palmetto Structure https://nwdistrict.ifas.ufl.edu/hort/2021/03/04/saw-palmetto/

#flatwood #saw palmetto #prescribed burn #

Here is our chance to see and compare exploration experiences These are observations of a Pine flatwood in Estero Bay State Preserve, Florida which we will compare to an observed hummock system. In theory, this flat should not be here in South West Florida because the karst is close to the surface however other soil conditions are present.* We explored a Florida hard wood hummock in the last two post. Part one of this observation shows the general landscape**. Part two will show the details of the smaller scrub plants.

The feature image is the Florida State flower. The Tickseed (Coreopsis Leavenworthii)

The Florida Estero Bay Preserve comprises 11,300 acres (17 square miles) and is part of the Estero River delta. It has a complex assembly of plants and animals. There are two entrances. The southern River Scrub entrance was chosen because it opens into a scrubby flatwood pine area. Often this area is wet, however, today the specific area of interest was the dry scrub area. February is among the seasonally drier months and the plants should be typical of the reserve’s description.

This feature image is emblematic of a SWFL Pine flatwoods. They are characterized by:
Low, flat topography
Relatively poorly drained, acidic, sandy soil
Plant growth composed of open pine woodlands with frequent fires

The last time I was here was in February 2023, three months after hurricane Ian flooded this area with salt water to a depth of more than twelve feet. I then reconnoitered the area for just an hour with the intention to revisit with good preparation. On this day I was surprised to find the area reasonable vital however, some of the grasses and palm trees were still quite distressed.

February 2023. The only live oak in the area was easy to see, but could not be found Feb 2024.

February 2024. This slash pine did not survive the hurricane and flood surge.

The walk-about:

For nearly five hours I walked through a five-mile portion on and off the trails in the southeastern portion of the preserve. The trails were well marked, wide and relatively easy to hike. Off the trails, it was very difficult to make any headway. I was insufficiently prepared for the hazards of the flats. Because of the dangerous anatomy of the saw palmetto growth, it was nearly impossible to walk.

Savanna like flat covered with saw palmettos. Slash pines were about 10 meters apart.

The Scrub flat seen a year ago is in recovery. The palm has scorched bark.

This pine flatwood area was burned last year and has made an excellent regeneration. In the middle of the picture the lower leaves of the palm burned however, the crown is still intact.

This area was burn after hurricane Ian, The defoliation is is the result of both storm surge wind damage and prescribed burn. Many of the plants suffered and died as as result of the salt water immersion.

This return visit was exactly one year after the last. This area is very open and bright. The savannah like landscape was covered with low growth saw palmetto and grasses. This was regularly punctuated by sabal palm and slash pine trees. The difference between this pine flatwood and the hardwood hummock of the C.R.E.W. could not be more dramatic. When compared to the hardwood hummock, the flats had very few large gymnosperms such as the live oak trees. There were no hummock islands of bunched trees. While this walk-about was during midday there were few insects or birds. It was very quiet. One mated pair of ospreys were flying through the trees near the river. They occasionally ventured into the flats.

Tidal swamp land with brackish water tolerant plants including mangroves.

Unburned flood tidal marsh areas were not explored; however, they seem to be fully covered with mangroves. Photos of that area show the limit of the walk to the northwest.

Riverbank of part of the Estero River delta with mangrove.

Chart of Estero Bay South – Ecosystems,
walking detail. Red line is the walking trail.

Discussion:

The hardwood hummock had a range of elevations. The high ground was about 10 inched above the pond level. Contrarily, this ecosystem is very flat and at this time of the year is dry. The hardwood hummock had live oak trees with some pines and palms. The flatwood area at this location is populated almost exclusively by slash pines with a few palms and oaks. The understory is scrub consisting mostly of saw palmettos. Walking toward the wetlands, some hardwoods were in the ectotone between the flats and the wetland mangroves. .

There is much more to see in this preserve. During dry periods, the southern portion could be traversed on the paths by bicycle. Go to part two of this exploration!

References:

*Natural Resource certification

**Scrubby pine flatwoods

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#pine flatwood #scrubby flatwood #prescribed burn #tidal marsh #surge #saw palmetto, #ecotone

Tag: slash pines

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